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Spectrum Smart

4G LTE USB Cellular WiFi Hotspot with SIM Card – Creates WiFi from Mobile Data, Not a USB WiFi Adapter – Portable Travel Modem – North America/EU – Subscription Required

  • Based on 42 reviews
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Availability: In Stock.
Fulfilled by Amazon
Arrives Monday, Jun 1
Order within 4 hours and 6 minutes
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Features

  • 4G LTE Cellular Hotspot Dongle This compact USB-powered device uses a pre-installed SIM card to connect to 4G LTE cellular networks and create a WiFi hotspot for your laptop, tablet, or phone. It does not connect your computer to existing WiFi like a USB WiFi adapter. Simply plug it into a USB power source for portable internet accessno home cable or broadband required. Works in the US, Canada, Mexico, and most European countries.
  • Wide Network Compatibility Use AT&T and T-Mobile networks for extensive coverage and fast 4G LTE performance. Typical download speeds range from 515 Mbps, sufficient for smooth video streaming. Supports full key LTE bands in both US, Canada, Mexico and European countries to deliver strong, stable connectivity. Fully support Bands B1, B2, B3, B4, B5, B7, B8, B12, B17, B20, B28, B38, B40, B41, and B68.
  • Pre-Installed SIM Comes with a Spectrum SMART SIM card pre-installed. A cellular data plan is required and not included with purchase. Activation and subscription must be completed via the official Spectrum SIM website.
  • Connect Multiple Devices Seamlessly share your internet connection across multiple devices at once. Ideal for families, remote teams, or small businesses. Provides fast, stable WiFi for laptops, smartphones, tablets, and morewhether at home or on the go.
  • USB-Powered for Convenience No bulky adapters needed! Simply plug into any USB portlaptop, power bank, or car chargerfor instant internet access.
  • This product is not affiliated with Charter Communications, Spectrum Cable, or Spectrum Mobile.

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


Maximum Upstream Data Transfer Rate: 150 Megabits Per Second


Number of Antennas: 1


Smart Home Compatibility: Not Smart Home Compatible


Router Firewall Security Level: basic


Wi-Fi Generation: WiFi 5


Has Internet Connectivity: Yes


Router Network Type: 4G


Is Modem Compatible: Yes


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


UPC: 198715242355


Manufacturer: Spectrum Smart


Mfr Part Number: Puffin Smart


Unit Count: 1.0 Count


Warranty Description: 1 year


Item Dimensions L x W x H: 1.55"L x 1"W x 3.95"H


Color: white


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Monday, Jun 1

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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Learn more about financing & leasing here.

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Top Amazon Reviews

    • Excellent Wi-Fi USB Dongle Router 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 Reviewed in the United States on March 1, 2026 by debra patterson
    • Get something else.
While it works okay for a stand alone wifi, the cost, speed is not worth it. It is also loaded with a lot of spyware, so your virus software will have fun blocking a lot of the attacks it does.
Reviewed in the United States on April 2, 2026 by Ken
    • Reliable mobile hotspot Reliable mobile hotspot
Review Image by Roderia Kelly
I purchased the yearly amount of data and I thought I would’ve used more data than I have. It was worth the price because I can use this for my kids tablets as well for our road trips. Speed is fast and great! Nice size product. Connectivity is super fast and easy to use
Reviewed in the United States on April 27, 2026 Reviewed in the United States on April 27, 2026 by Roderia Kelly
    • Works well! 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 Reviewed in the United States on March 5, 2026 by Kara L.
    • 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
    • A great value!
This is the real deal! For folks who are wanting to incorporate this into another project: it was all plug and play for me with a Onomondo SIM. I was able to login to the admin UI (custom Luci) and update the APN. While I was in there I poked around and everything you need is easily accessible from the UI. I even verified NDIS worked as expected. Four stars for the entire solution not being open source and for high data prices on the included SIM. ... show more
Reviewed in the United States on October 30, 2025 by Jim Wyatt
    • 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

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