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Spectrum Smart

Spectrum Smart 4G LTE USB WiFi Hotspot | Double-Carrier (AT&T/T-Mobile) | SIM Included | Portable WiFi for Travel, Car, RV, Camping & Remote Work

  • Based on 114 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Sunday, Oct 25
Order within 8 hours and 55 minutes
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Features

  • True Double-Carrier Coverage Works on both AT&T and T-Mobile networks, not locked to a single carrier. Automatically connects to the strongest signal. SIM card included in the box no separate purchase needed.
  • Plug & Play Portable WiFi Plug into any USB port (wall adapter, laptop, car charger, power bank) and create a personal WiFi hotspot in seconds. No software, no drivers, no setup. Up to 10 devices connected simultaneously.
  • Built for Life On the Go Road trips, RV camping, remote cabins, job sites, coffee shop backup. Anywhere there's cellular signal, there's your WiFi. Fits in your pocket smaller than a pack of gum.
  • Not a USB WiFi Adapter This creates its OWN internet from cellular data. Doesn't need a cable modem, home broadband, or public WiFi. True mobile internet wherever your phone gets a signal.
  • 500MB Trial Data Start with a $10 plan and get an extra 500MB of data to test your coverage. If the SIM can't connect or doesn't work with your device, contact us within 7 days for a refund. Works, or it's on us.
  • USB-Powered for Convenience No bulky adapters needed! Simply plug into any USB portlaptop, power bank, or car chargerfor instant internet access.
  • Works Across North America Coverage in US, Canada, and Mexico. Use at home, on the road, or across the border. One device, continent-wide.
  • 4G LTE Speeds up to 150 Mbps Stream, browse, video call. Fast enough for multiple users. No throttling, no data caps from the device itself.

Description

What is this device for? A pocket-sized 4G LTE Wi-Fi router with a preinstalled SIM card. Plug it into any USB port to create a private hotspot for up to 10 devices: laptops, desktops, smart TVs, tablets and more. Does it need a battery? The dongle does not need a battery. It is powered by any USB port. Just plug it into a USB port to use. What networks does it use? The dongle has a built-in SIM card. It uses both AT&T and T-Mobile network. We can also change to SIM card with Verizon. Can I use it in my car? You can plug the dongle to the USB port in your car. It wil provide the in-vehicle wifi.

Brand: Spectrum Smart


Model Name: Puffin Smart


Special Feature: Long-Range 4G LTE Connectivity Provides reliable internet access even in remote areas, perfect for travel or outdoor use., Support for 8 Devices Seamlessly connects multiple devices, making it perfect for families, teams, or small businesses. See more


Frequency Band Class: Single-Band


Wireless Communication Standard: 802.11ac, 802.11ax, 802.11b, 802.11g, 802.11n


Compatible Devices: Laptop, Personal Computer, Smart Television, Smartphone, Tablet


Recommended Uses For Product: Enhances Wi-Fi reception in low-signal areas, Ideal for laptops, PCs, smart TVs, and gaming consoles, Perfect for travel, remote work, and temporary internet setups, Portable Wi-Fi hotspot for travel, camping, and road trips, Provides a personal hotspot for hotels, dorms, or shared spaces, Reliable internet access for RVs, cabins, and remote work sites, Supports HD video streaming, video calls, and large file transfers See more


Included Components: Spectrum Smart SIM Card, USB WiFi Dongle


Connectivity Technology: LTE, 4G, WiFi-6


Color: white


Other Special Features of the Product: Long-Range 4G LTE Connectivity Provides reliable internet access even in remote areas, perfect for travel or outdoor use., Support for 8 Devices Seamlessly connects multiple devices, making it perfect for families, teams, or small businesses.


Frequency Band Class: Single-Band


Wireless Compability: 802.11ac, 802.11ax, 802.11b, 802.11g, 802.11n


Compatible Devices: Laptop, Personal Computer, Smart Television, Smartphone, Tablet


Antenna Location: Enhances Wi-Fi reception in low-signal areas, Ideal for laptops, PCs, smart TVs, and gaming consoles, Perfect for travel, remote work, and temporary internet setups, Portable Wi-Fi hotspot for travel, camping, and road trips, Provides a personal hotspot for hotels, dorms, or shared spaces, Reliable internet access for RVs, cabins, and remote work sites, Supports HD video streaming, video calls, and large file transfers


Connectivity Technology: LTE, 4G, WiFi-6


Antenna Type: Internal


Operating System: RouterOS


Security Protocol: WPA-PSK, WPA2-PSK


Number of Ports: 1


Control Method: App


Data Transfer Rate: 150 megabits_per_second


LAN Port Bandwidth: 150 megabits_per_second


Maximum Upstream Data Transfer Rate: 150 megabits_per_second


Number of Antennas: 1


Router Firewall Security Level: basic


Wi-Fi Generation: WiFi 5


Router Network Type: 4G


Connectivity Protocol: Cellular (4G LTE)


Coverage: Nationwide (AT&T, T-Mobile, Verizon)


Frequency: 2.4 GHz


Brand: Spectrum Smart


Model Name: Puffin Smart


Built-In Media: Spectrum Smart SIM Card, USB WiFi Dongle


Model Number: Puffin Smart


Unit Count: 1 Count


UPC: 198715242355


Number of Items: 1


Number of Packs: 1


Manufacturer: Spectrum Smart


Mfr Part Number: Puffin Smart


Warranty Description: 1 year


Item Dimensions L x W x H: 1.25"L x 0.3"W x 3.75"H


Color: white


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Oct 25

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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Leasing options through Acima may also be available during checkout.

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Top Amazon Reviews

    • Excellent Wi-Fi USB Dongle Router
Review Image by debra patterson
Hello everyone, I live in a 15 bedroom/bathroom house, and we share the kitchen, laundry room, pool and WIFI. Sharing WIFI with sometimes 15 people can be draining on me and my laptop. I had a WIFI range extender from when I lived in a RV to boost internet from a house to my RV. I tried that here, but it is not exactly what works for this type of situation. But the "4G LTE-Advanced USB Wi-Fi Dongle & Mobile Hotspot Router" does work and works wonderfully. In fact, I just plugged it in now as things were very slow right now and I was getting stressed. As soon as it connected surfing is smooth and fast. It comes with plenty of directions so installing is very easy. The only issue for me is I can't afford a lot for a large data plan so I just use it whenever I need to do something important and can't wait for things to upload. because 15 other people are online. Since we already pay for internet access here at my house this Spectrum Smart device will be my emergency backup. It will also be good when traveling. Highly recommend. I keep the box and information in my desk drawer so it's handy when I need it. ... show more
Reviewed in the United States on March 1, 2026 by debra patterson
    • Can not customize Wi-fi name or password.
First with con: Can not log into router web page to change Wi-Fi name or password. tried to find online but the ones I find do not work. user: "admin", password "admin" and so on. Understood that I could do this on my own. Pro: It does however work with built-in Wi-Fi username and password, but I want to be able to customize it in case someone got the built-in user or password. Registered with puffin loT. Will not support through contact with Spectrum instead with amazon customer service (no good with product parameters). no numbers to contact with Spectrum or Olax (manufacturer). Have sent an email. Will see how fast it gets replied to. Will update when find out more. 2026 0929. ... show more
Reviewed in the United States on September 29, 2026 by Chuck
    • Without cell service, this is for you!
Are you without cell phone service because maybe times are hard and you can’t afford to pay the big companies for a plan? Well that was me for 6 months and after I ordered this thing, I had WiFi everywhere I went on my phone. It pulls off all the major service towers so service was never an issue even when camping and no one else had service. If anything it made my service quicker! The plans have as low as $10 a month but that doesn’t give you much data if you use your device all the time you will only have less than a day of use. It is small and compact and only needs to plug into a USB power source like the USB outlets in your car, power band or wall charger. ... show more
Reviewed in the United States on April 1, 2026 by Allyssa Karppinen
    • Strong signal, easy to setup
Easy to install, easy to refill and strong signal. Would like additional refill options but it works great.
Reviewed in the United States on September 17, 2026 by Dorene
    • Very useful and reliable
Easy to setup. Very useful and reliable. Affordable service.
Reviewed in the United States on July 31, 2026 by Reginald Thompson
    • Didn’t work for me
Terrible internet I had to send it back because it didn’t work for me like I wanted it too. Bit customer service did give me my money back for an extra purchase that wasn’t supposed to go through however you can’t call you have to communicate through email.
Reviewed in the United States on December 18, 2025 by Hope
    • F-This Product… RUN!
I don’t usually beg, but this time I beg any reader who comes upon this review run so far away and don’t look back. The aspect of value for money is complete BS, they are charging you $10 more to sell via Amazon when on the website is “less expensive”. Moving on to Connectivity, Speed, Security, and Firmware Update, that is NON-EXISTENT as you won’t be able to access the internet as long as you are traveling out of any metropolitan area, which then sets up the company claims of great for “nomad” or “off-the-grid” workers, to be that of deceptive and unfair practices. Lastly, supposed User Interface, I only have one thing to comment about that “HA”. The companies website to “purchase” more data, or do anything at all, is so antiquated it reminds of the AOL Stone Age days, laggy, tons of bugs, appears fraudulent, gives you false guarantees of “your money back”, and ultimately gives off vibes that this is a sham/shell company siphoning money somewhere to the Middle East or some third world country, with only one customer service rep who will respond to you, Maria Danag, regarding your questions, YEAH SUS AF! ... show more
Reviewed in the United States on March 13, 2026 by Picasso
    • Works well!
Review Image by Kara L.
You defiantly get what you pay for with these dongles! Its all about the number of bands. This one has more than most. The cheaper ones only work on 3 or 4 bands so connectivity is sparse at best. If the bands are not listed in the description, Stay away! First thing you do is throw away the sim card and get another data plan sim. I found that it Works with Mint mobile, Kiwisim, Tello. Basically GMS (T-moble and AT&T networks} without any problems. Haven’t tried visable moble yet but have my doubts as it lacks band 13 needed to run on Verizon, will try. Its Definitely not a Olax U90, doesn’t even match the picture on the box. I suspect its a cheaper version that Spectrum stuck its name on and called it a "U90 slim" to sell a scammy data plan. If you use this as a OpenWRT router LTE input. It works great! You can turn off the WiFi and use it as a dongle only, thus not broadcasting your SSID. Easy to set up and add APN’s and mess with other peramators. All things considered, I'm glad i got it because it works with the networks mentioned and i can use it remotely for security cameras and remote control devices. ... show more
Reviewed in the United States on March 5, 2026 by Kara L.

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