D-Link Wireless N-150 Mbps USB Wi-Fi Network Adapter (DWA-121)

I got this to have a means of quickly adding Wifi to older desktops while debugging them. It's small and compact. On Windows 10 the supplied application is needed configure the Access Point & password, but installation was straightforward. Signal strength seemed decent for such a small device.The one caution is that there are no MacOS drivers for recent MacOS releases (Catalina onwards), but this is a known issue with legacy hardware like this. Linux *should* be OK but I haven't tried that yet.

So far this has been great. I've dropped it into several systems that only have Ethernet cards. Immediately recognized on systems from XP to a handful of Windows servers, and even into CentOS 7 servers. I configure the Ethernet interfaces before shipping them out. I work from home, so I do server configuration then ship them out for racking in our datacenters. It's awesome being able to just drop this in, configure the interfaces as needed, then pull it out and it's completely ready to go.Absolutely no issues on joining my WiFi network (WPA2) on 2.4 or 5GHz. Transfer rates are good. Range seems OK-- although I have a WiFi router and 2 APs in my home. Getting a weak signal in my home or yard is a challenge.For the compact size and compatibility this thing is great.

Works perfectly on my girlfriend's laptop. Since the it was only capable of B&G this seemed a good upgrade to bring her up to speed. Set up wasn't as easy as plug and play though. While the software detected our network, it kept timing out and wouldn't connect. I had to disable the option to let Windows configure the wireless settings and then it jumped on. No problems after that and it also picked up without issue each time after wakeup. There's a small blue LED that indicates activity which is nice touch. Initial bandwidth test was 15Mbps down and 1 up, not bad for a USB adapter; test was in the evening.Hardware: Thinkpad T40OS: Windows XP SP3Router: Apple Airport Extreme @ 802.11n on 5GHz only and b/g on 2.4GHz

Why, oh why did you discontinue this and replace it with a bigger one, DLink? We've used this for over a year to replace failing wireless adapters in laptops and desktops. What was great about the DWA 121 was its tiny size. It was barely noticeable from an aesthetic standpoint. More importantly, it is so small, it's difficult to accidentally bang around or damage. Similar in size to Logitech's wireless USB mouse adapters, this was perfect. My wireless router at our shop is purposefully placed approximately 40 feet away from the front of our shop. The recommended range is 30 feet, line of sight. The DWA 121 has never had one single problem reaching 40 feet through three walls with metal studs and several other wireless devices (two cell phones, one 2.4 Ghz phone, one 5 Ghz phone, two wireless video cameras, plus a refrigerator and a microwave oven) between it and my cheap D-Link wireless router. I always test the worst case scenario in my shop, and the DWA 121 has never failed once. I have sold several of these over the past year or so and have had zero returns or complaints. You'd better get yours quick before I buy up the rest of the inventory before it's replaced with the DWA 131 :(

This thing worked as far as the WiFi connection, however piece of plastic at the top came completely off the first time I tried to remove it from the USB port. From that point, the internal board came out but continued to work even though the structural integrity of the adapter was a weak joke. The product works if you can keep it together but be careful, any slight pressure and it's coming apart.

Excellent performance. I experienced an immediate speed increase with internet connections and surfing. Much more efficient way to upgrade the computer's wireless capability; simply plug it in to a USB port. I was considering upgrading my laptop's internal wireless card but that option would have cost more and required that I dig into the innards of my old Dell laptop. Only downside is that it has to be in a USB port, making the port unavailable for other devices.

I just installed this on a desktop running windows 7. I had some problems getting the device to work and required a long conversation/diagnostic with D-Link (and required me to downgrade my wireless router encryption to make it work). Once up and running, I shared with technical support that the connection seemed slow, which they attributed to line of sight and potential other things interfering. This was confusing, since I have a laptop sitting right next to this machine, and it can connect to the wireless router much faster. I then tested the download speeds of my laptop and the DLink device, and the DLink device was about 6X slower (2.68Mbps vs 13.69Mbps). I will continue to tweak and work with this to see if I can repair, but until then, this is rating. Recommend keep looking.

Easy no software to install