Streamlight 66604 MicroStream USB 250-Lumen 1150-Candela EDC Ultra-Compact LED Flashlight with Rechargeable Battery, Easy-Open Box, Black
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Availability:
In Stock.
Arrives
Thursday, Jun 11
Style: Easy-Open Box
Size: USB Rechargeable (Pack of 1)
Color: Black
Features
- Powerful and Portable: Features 250 Lumens, 1150 Candelas, beam distance of 68 Meters with a run time of 1.5 Hours on high; On low mode, 50 Lumens, beam distance of 31 Meters with a run time of 3.5 Hours
- USB Rechargeable: Powered by an internal lithium-ion battery; recharges via included USB cable and features a charge status indicator
- Compact Size: Measures under 4 inches in length with a slim, pocket-friendly profile; overall dimensions are 3.87" L x 0.61" W x 0.61" H
- Hands-Free Operation: The Streamlight MicroStream comes with a removable pocket clip that allows you to clip it on a brim of a hat for hands free use
- Built Streamlight Tough: Durable aluminum construction, IPX4 water resistant and 1 Meter impact resistance tested
Description
The Streamlight MicroStream USB Rechargeable LED flashlight is a high- performance everyday carry light built for reliability and convenience. Delivering up to 500 Lumens on high, it features two brightness modes for versatile use, from close-up tasks to long-range illumination. Compact in size yet powerful, the MicroStream USB is powered by a rechargeable battery that conveniently charges via a micro-USB port with a charge indicator to monitor power status. Its durable anodized aluminum body is impact and abrasion- resistant, while the IPX4 water-resistant rating ensures dependable performance in challenging conditions. A two-way pocket clip allows for flexible carry options; attach it to your pocket, belt, or hat brim for hands- free lighting. Combining portability, ruggedness, and long-lasting power, the Streamlight MicroStream is an ideal companion for technicians, first responders, outdoor enthusiasts, or anyone needing dependable illumination on the go.
Specs & Other Info
| Specification | Details |
|---|---|
| Key Features | Highly Durable, Shockproof |
| Color | Black |
| Power Source | Battery Operated |
| Light Type | LED |
| Material | Metal |
| Luminosity | 250 Lumens |
| Accessories Included | Lanyard, Clip, Battery |
| Dimensions | 3.87"D x 0.61"W x 0.61"H |
| Voltage | 3V (DC) |
| Beam Distance | 68 Meters |
| Battery Type | Lithium Ion |
| Weight | 2.08 oz |
| Number of Batteries | 1 Lithium Ion (included) |
| Water Resistance | Water-resistant |
| Warranty | Limited Lifetime |
| Brand | Streamlight |
| Peak Beam Intensity | 1150 Candela |
| Runtime | 1 hour |
| Charging Style | USB Rechargeable |
| Compliance | IPX4, CE, ANSI |
| Use Cases | Outdoor & Indoor Activities including Cycling, Caving, and Camping |
| Manufactured In | China |
| Model Number | 66604 |
Frequently asked questions
The Streamlight MicroStream 250-Lumen flashlight features a rechargeable battery that, once fully charged, can provide up to 3.5 hours of continuous use on its low setting. On the high setting, the battery life is approximately 1.5 hours.
Yes, the Streamlight MicroStream 250-Lumen flashlight is designed to be waterproof and has an IPX4 rating. This means it is resistant to water splashes from all directions, making it suitable for use in various weather conditions.
Yes, the Streamlight MicroStream 250-Lumen flashlight comes with a USB rechargeable battery and can be charged using most standard USB chargers. The micro USB port allows for convenient charging with common devices like laptop USB ports, car USB ports, or USB wall adapters.
The Streamlight MicroStream 250-Lumen flashlight utilizes a high-powered LED that can deliver a maximum output of 250 lumens. It is engineered for bright, powerful illumination, making it ideal for a range of everyday tasks and situations.
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Top Amazon Reviews
🚀 Abunda's Overview
This is our summary and key points to consider based on customer reviews.
The Streamlight 66601 MicroStream 250-Lumen EDC Ultra-Compact Flashlight earns high praise for its performance, durability, and design. Users emphasize its superior brightness and compact shape, making it an ideal everyday carry flashlight. The USB rechargeable battery offers convenience and environmental benefits, while its sturdy construction withstands rough usage and harsh conditions. Overall, customers are thrilled with its functionality, recommending it for anyone needing a reliable, portable light source.
Pros
- 🔆 Impressive brightness for its size, offering 250 lumens of light output.
- đź‘ť Ultra-compact and lightweight, enhancing portability for everyday carry.
- 🔋 USB rechargeable battery, reducing waste and operating costs.
- đź’§ Durable, impact-resistant, and waterproof construction for reliability in tough conditions.
- 🧢 Versatile pocket clip design for easy attachment to clothing or as a makeshift headlamp.
Cons
- ⏲ Limited information on exact battery life span per charge from reviews.
- 🔌 May require frequent recharging with heavy use, based on indirect mentions.
Should I Buy It?
Yes, the Streamlight 66601 MicroStream EDC Flashlight is highly recommended for its powerful output, compactness, and durability. It’s an excellent investment for anyone from outdoor enthusiasts to professionals looking for a reliable lighting solution. With its positive reviews focusing on performance and quality, it stands out as a top choice in the EDC flashlight category.
Style: Clear Retail Packaging
Size: USB Rechargeable (Pack of 1)
Color: Coyote
The Streamlight MicroStream 250-lumen rechargeable flashlight is exactly what I want for EDC. It’s small enough to fit perfectly in my Eberlestock Bando Bag but bright enough to handle anything I throw at it. The 250 lumens give plenty of light for searching bags, walking the dog, or checking gear at night without being overkill. Build quality is tough—Streamlight didn’t cheap out. The clip is solid, the switch feels reliable, and the USB rechargeable battery means no messing around with replacements. Battery life holds up well for its size, and charging is quick. It’s lightweight, compact, dependable, and fits perfectly alongside my EDC items. For the price, it’s one of the best compact flashlights you can carry.
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Reviewed in the United States on November 24, 2025 by Michael K.
Style: Clear Retail Packaging
Size: USB Rechargeable (Pack of 1)
Color: Coyote
Short review: Buy it, its a great budget EDC flashlight that comes in handy. Small, light weight and bright. Also great customer service. Long ass review version: The item that I had purchased was the coyote tan brown microstream streamlight. This item is one of my personal favorite Every Day Carry item. I purchase this item because of the size, lumen output and clip functionality. I decided to go with the coyote tan because of its high beam first function instead of low beam first. I thought it would be a useful tactic to blind someone if you ever had to use it to defend yourself in a dark environment. This little light can brighten up a room and 250 lumens from this light can temporally blind people if it were to shine in their eyes. Since the on switch is a tail switch, you could a handgun in one hand and use the momentarily light function (half compression) in the other hand to clear the rooms at night. Although a dedicated gun light would service better but this is a great option if you don't have one. The light is small and light weight so it won't take up room in your pocket or wherever you decide to store it. The dual clip function is a great way to go hands free by simply clipping it to your hat and it small enough to hold in your mouth if you decide to do that as well. I must mention that it doesn't provide the best grip on a cap so I would steer away if you are doing extreme movement while having it clipped there. The button is a bit hard to decompress if you have super weak hands. But on the plus side, I have never had the light go on in my pocket which to me is a big plus because I want the light to go on when I need it and a dead flashlight isn't a useful flash light. As for switching it from high mode to low mode, its not that challenging to adapt to. USB charging is convenient if you have a portable charger or a wall outlet near by. If you are really depending on needing a full battery in the nick of time, just carry another LI-ION to pop it in and boom you got yourself a working flashlight again. I also put a glow in the dark rubber band around the flashlight, which is a great and simple modification to seek your flashlight in the dark when it sitting on your counter or if you happen to drop it. I will mention that the flashlight that I received had an issue. The first initial compression put the low setting first then but after that it would turn the brightest setting on. After a couple of minutes of non use it will reset to the lowest setting again when I would compress it again. But I spoke with Mark the costumer service manager. The item has a lifetime warranty and I was able to get my light replaced. So if you have an issue, I would advise that you speak with the costumer service team before bashing on the product as they do up hold great service. It did take awhile for a response but I will give them the benefit of the doubt since it was close to SHOT Show and dealing with whining costumers can be a pain. So with any retail member please remember if you are patient and courteous, I'm sure they will treat you accordingly. I think the streamlight microstream is a great item to have and carry. $30 won't break the bank either if it mysteriously dissappears. Hope you enjoyed the essay.
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Reviewed in the United States on February 1, 2020 by David
Style: Clear Retail Packaging
Size: USB Rechargeable (Pack of 1)
Color: Coyote
Great low-profile flashlight. Pocket real estate is at a premium for me, so the size of these is perfect. I often have to use my mouth to hold flashlights at work so I can use both hands, and this has been the most comfortable flashlight my lips have clasped. I use it everyday and I use it A LOT. I have to keep an extra one of these in my backpack because sometimes the battery runs out before my workday is over, but usually it lasts me all day. Love that it’s rechargeable. I used it for over a year before I noticed it started to die quicker. I just replaced the old battery with a new stream light rechargeable battery, and it was like new again. Still WAY cheaper than a flashlight that just uses standard AA/AAA or CR123 batteries. I work on cars, so I’m never using it for anything more than 6 feet away, but for my purposes, this flashlight has been the gold-standard I measure all small handheld flashlights against. The amount of brightness you get for the size of the flashlight is top tier. The pocket clip snapped and broke on my first one after a couple years, but like I said, I use this all day everyday. I’d still say the durability is great for the price. I had to remove the pocket clip on my new one and squeeze it with some pliers to make it clamp down tighter because it kept falling off my pocket. Since then I haven’t had any issues. Love this little flashlight. I went through about 5 or 6 small flashlights before I found this one. This one is better in every way. As long as the price doesn’t go any higher it’s a 10/10 will buy again when I inevitably lose mine.
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Reviewed in the United States on December 13, 2025 by Ethan Hamilton
Style: Clear Retail Packaging
Size: USB Rechargeable (Pack of 1)
Color: Coyote
Amazing small flashlight that works in a key chain and fits nicely in your pocket. Is bright enough for any needs I've had in the past 6 years in all temperatures. The two lighting intensity options have also come in handy, and the brighter intensity being the primary one has been essential; only sometimes wanting to use the dimmer option by double tapping the activation button. By feeding a zip tie around the end of the clip area loop, you can then use that tight loop for a key chain and the flashlight will stay in place while still allowing for articulation in the key chain. The seal to the charge port has worked fine, even surviving half an hour in the snow after I accidentally dropped the flashlight there and later went looking for it. I haven't felt the need for another flashlight ever since I got this, and having it always with me with my key chain has been a positive in some unexpected scenarios.
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Reviewed in the United States on February 2, 2026 Reviewed in the United States on February 2, 2026 by Silent
Style: Easy-Open Box
Size: USB Rechargeable (Pack of 1)
Color: Black
Pros: Compact size (the length about the size of my index finger from tip to knuckle, I use XL gloves) Lightweight (Stays in shirt pocket and doesn't fall out) Good Brightness Metal case, so should be fine from 5ft drop onto cement (haven't tested yet tho) Rechargeable, if that model is purchased (about 2-3hr if fully charged) Cons: "focusing" lens/adjustment is virtually pointless, as in barely makes a difference (tip slides out to "focus" light beam ) The On/Off button modes This is my biggest gripe and The reason I gave this light a 4star instead of 5stars I believe the button has 2 modes of use 1: press lightly and hold button down for quick inspections or uses (manually keeping light powered on 2: click light on/off, for extended periods of use For the 1st mode, Light works great, highly recommend if you plan to use it like that, BUT the 2nd mode is where I have my issue. The button require alot more effort to click on/off than it should. I started thinking I might be getting arthritis (I am a mechanic so possible) because sometimes I could not click it on/off without pressing down fairly hard. I assume it's an issue with how "small" the button is (the rubber isn't as squishy, so more resistance) but I have had times where I'm having to actually "think" about how I'm pressing the button, because I'm unable to click it on/off, I've never had similar issues with other lights before, except for when the button was broken. Edit: I added a small piece of paper under the button (you can unscrew the button) and now I can click it on and off effortlessly. Also added pictures showing the "focusing" function.
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Reviewed in the United States on November 20, 2023 Reviewed in the United States on November 20, 2023 by James G.
Style: Clear Retail Packaging
Size: USB Rechargeable (Pack of 1)
Color: Coyote
It works pretty well overall, the only thing is that the battery life is shorter than I expected. Bright mode is very bright but will only give an hour or two of run time it seems, it will also kinda glitch and flicker out at low battery. Can't expect too much for its size, it is extremely compact so if that's what you're looking for, it's a good choice! Only other gripe I have with it is the spring tension on the on/off button. It's kind of hard to press it all the way one handed to where it clicks and stays on. You can unscrew the cap and just have that white switch which is much easier to control one handed.
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Reviewed in the United States on November 8, 2025 by Dylan Chana
Style: Clear Retail Packaging
Size: USB Rechargeable (Pack of 1)
Color: Coyote
This is about the perfect gift for a guy. It is more useful than a gift card, holds a charge well, is plenty bright, and is truly EDC-sized. It is small enough to disappear in your pocket—about the size of a PM2 pocket knife—but still gives you solid performance. Great little flashlight.
Reviewed in the United States on April 22, 2026 by Wes
Style: Clear Retail Packaging
Size: USB Rechargeable (Pack of 1)
Color: Coyote
Excellent penlight, its small, lightweight, very durable its been dropped through engine bays countless times, its resistant to quick drops in automotive fluids and water, the o ring seal that protects the charging port works great. Ive used Streamlight Stylus penlights for a long time and this one is just as durable, more than twice as bright, is smaller, and costs significantly less to run. The money I save not buying batteries has paid for this flashlight a dozen times over in the few years I have used it. The pocket clip is fantastic the double bend in it allows it to slip into your pocket easily and allows you to clip it to the bill of a hat as a headlamp, the clip holds the light securely in your pocket and doesn't easily pop off the body of the flashlight, that is an annoying and very common problem with other lights I own which is why I glue them in place. (glued this one too) The rechargeable battery gives +50% brightness for 2-3 days for how much I use it which is short periods that are usually 30 seconds to a few minutes at a time at least a dozen times throughout the day. The battery life is comparable to the life I was getting out of 2 lithium AAA batteries in larger/longer flashlights like the Stylus the only difference is when I notice its running down I just leave it on to drain the battery so I can recharge it instead of limping along with a light that is too dim for a day or two to not waste money, most importantly I don't worry about using it "too much" since I am not paying for expensive lithium batteries. From completely dead to fully charged takes about an 1.5-2 hours (never timed it but that's a good estimate) but if the battery is dead and you just want to use it 15-20 minutes on the charger gets you plenty of brightness and usable run time. In summary this is a fantastic, small, lightweight, fairly bright, durable rechargeable penlight that performs better than the comparable AAA 2 battery lights I have owned from every major brand. Buy one you will not regret it.
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Reviewed in the United States on May 27, 2023 by Tom Sawyer