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Streamlight

Streamlight 66603 MicroStream 250-Lumen 1,150-Candela Flashlight, Blue

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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Oct 11
Order within 21 hours and 1 minute
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Style: Clear Retail Packaging


Size: 3.87" L × 0.61" W × 0.61" H


Color: Blue


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.

Special Feature: Durable, Lightweight, Portable, Rechargeable, Weatherproof


Color: Blue


Power Source: Battery Powered


Light Source Type: LED


Material: Aluminum, Polycarbonate


Additional Features: Durable, Lightweight, Portable, Rechargeable, Weatherproof


Power Source: Battery Powered


Light Source Type: LED


White Brightness: 250 lumens


Voltage: 3.7 volts


Battery Type: Lithium Ion


Number of Batteries: 1 Lithium Ion batteries required. (included)


Water Resistance Level: Water Resistant


Light Output Maximum: 250 lumens


Battery Description: Lithium-Ion


Light Source Wattage: 1.25 watts


Mounting Type: Cap Mount or Pocket Clip


Battery Life: 5 hours


Light Source Special Features: Rechargeable, Water Resistant


Beam Angle: 10 degrees


Runtime: 1 hour


Number of Light Sources: 1


Wattage: 1.25 watts


Light Path Distance: 68 meters


Color: Blue


Style Name: Clear Retail Packaging


Finish Types: Clear


Shape: Round


Warranty Type: Limited


Specification Met: ANSI FL1, CE, IPX4


Included Components: Battery, Clip, MicroStream Flashlight, Usb Cable, User Guide


Brand Name: Streamlight


Recommended Uses For Product: Outdoor


Global Trade Identification Number: 30


Number of Packs: 1


Manufacturer: Streamlight


Number of Items: 1


Item Highlight: 250 lumens; 1,150 candela peak beam; USB rechargeable capable; multi-mode lighting; IPX-rated water resistant


UPC: 080926666030 080926614284


Manufacturer Warranty Description: Limited lifetime warranty.


Unit Count: 1 Count


Item Length: 5 inches


Item Type Name: Every Day Carry Flashlight


Model Number: 66603


Manufacturer Part Number: 66603


Item Dimensions D x W x H: 3.87"D x 0.6"W x 0.6"H


Item Weight: 1.28 ounces


Size: 3.87" L × 0.61" W × 0.61" H


Item Dimensions L x W x H: 3.87"L x 0.6"W x 0.6"H


Material Type: Aluminum, Polycarbonate


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Oct 11

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

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Top Amazon Reviews

    • Small but Seriously Bright
Style: Clear Retail Packaging Size: 3.87" L × 0.61" W × 0.61" H Color: Coyote
The Streamlight MicroStream USB is an excellent little flashlight for everyday carry. Despite its ultra-compact size, the 250-lumen output provides plenty of light for everything from finding your way around at night to working in tight spaces. I really like the rechargeable USB design—no need to constantly keep spare batteries around. It’s lightweight, easy to carry in a pocket, and feels very well-built. The coyote finish also gives it a rugged look. This is one of those tools that’s easy to carry every day and incredibly handy when you need it. Great size, great brightness, and excellent quality. Definitely recommend! ... show more
Reviewed in the United States on August 21, 2026 by Jeff Cayton
    • Fantastic small rechargable penlight.
Style: Clear Retail Packaging Size: 3.87" L × 0.61" W × 0.61" H 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. ... show more
Reviewed in the United States on May 27, 2023 by Tom Sawyer
    • Best value pocket flashlight for EDC. keeping in your work bag, in the drawer at home or wherever.
Style: Easy-Open Box Size: 3.87" L × 0.61" W × 0.61" H Color: Coyote
Half the size of a pen, brighter than you would expect. I use it for daily carry, work and around the house. Cool looking simple but bright flashlight. The clip is nice, double sided so you can clip it IN your pocket or ON the brim of your hat, effectively making it function as a headlamp. This is the second that I purchased and I will buy another if and when this one decides to stop working properly. My first one lasted 5 years and I lost it. I'm sure whoever found it still uses it to this day. Well worth the money for a reliable and useful flashlight. ... show more
Reviewed in the United States on July 23, 2026 by Frank Santanella
    • Tiny beast
Style: Clear Retail Packaging Size: 3.87" L × 0.61" W × 0.61" H 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. ... show more
Reviewed in the United States on February 1, 2020 by David
    • Works great, but not made in USA
Style: Clear Retail Packaging Size: 3.87" L × 0.61" W × 0.61" H Color: Coyote
This works exactly as advertised, and is much smaller than it appears in the description (that's not a bad thing). It works extraordinarily well, and gets about 45 minutes use on high and well over an hour on low. I bought this for two reasons, 1) it's rechargeable, and 2) Streamlight advertises their products to be American made or assembled. 1) it recharges well and is exactly what I expected. 2) it's labeled as "Made in China" on the package. ... show more
Reviewed in the United States on March 21, 2026 by KS
    • This is the one, your EDC torch.
Style: Clear Retail Packaging Size: 3.87" L × 0.61" W × 0.61" H Color: Coyote
I was first turned on to this little light while taking a tactical pistol course. I wear this little thing everyday, I don’t notice it’s there until I need a torch. It’s light, bright and works perfectly, I love that it’s rechargeable and dimmable (dark tan earth/coyote). I’ve bought one for every member of my family and will keep giving them as gifts. Much brighter than your phone and the clip will let you attach it to your hat, great feature (hands free). I’ve been owning mine for a few years and continue to use it daily. Great lil light. ... show more
Reviewed in the United States on September 9, 2026 by Edgar C.
    • Can’t go wrong with this EDC flashlight
Style: Clear Retail Packaging Size: 3.87" L × 0.61" W × 0.61" H Color: Blue
Review Image by Brian
Overall, a solid buy. I highly recommend this flashlight for quick uses and other EDC needs. Pros: -Very Compact -250 Lumens is perfect for EDC flashlight -Rechargeable Lithium Battery -Streamlights are high quality Cons: -Not a long duty, emergency flashlight (floods, storms, extreme use) -Compact enough to easily get lost in crevices -Pricey (you get what you pay for) ... show more
Reviewed in the United States on September 17, 2026 by Brian
    • Best small flashlight I’ve ever owned.
Style: Clear Retail Packaging Size: 3.87" L × 0.61" W × 0.61" H 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. ... show more
Reviewed in the United States on December 13, 2025 by Ethan Hamilton

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