IOGear USB 2.1 Bluetooth Micro Adapter GBU421 Reviews

When buying IOGear USB 2.1 Bluetooth Micro Adapter GBU421 make sure to ask yourself the right questions. There are 273 reviews for this priced cheap IOGear USB 2.1 Bluetooth Micro Adapter GBU421.

IOGear USB 2.1 Bluetooth Micro Adapter GBU421

  • IOGEAR Bluetooth USB Micro Adapter offers Bluetooth connectivity at a fraction of the size of normal Bluetooth USB adapters
  • This Bluetooth Class 2 adapter is also compatible with both Mac and PC computers, and offers a wireless range of 30 feet (10 meter)


Taking notes while listening to a conversation.

Buying Questions

  • Does the headset fit your head? Or ear?
  • Does it install easily?

IOGear GBU421 Bluetooth 2.1 USB Micro Adapter, the IOGEAR Bluetooth 2.1 USB Micro Adapter offers Bluetooth connectivity at a fraction of the size of normal Bluetooth USB adapters. About the size of an adult fingernail, the IOGEAR Bluetooth 2.1 USB Micro Adapter allows users to connect to all the latest Bluetooth devices like cell phones, PDAs, mice and keyboards. Because the Micro Adapter is so small you can easily plug it into your computer without blocking any surrounding USB ports. The Micro

Read the reviews below to get a better idea.

Rating: (stars out of 273 reviews)

Price: $ 10.67

5 Responses to “IOGear USB 2.1 Bluetooth Micro Adapter GBU421 Reviews

  • Review by BikeStrong

    *** My comments (below) are from January 2009. One of the more recent comments (April 2010) states that my issues are no longer valid. Just a heads up that things change/improve over time. ***

    The product works (eventually) and is low priced and is tiny. But, before you install it, please consider the following. Customer care by Iogear is horrendous.

    The first hurdle is bad instructions. Step 1 for Vista says you MUST insert the device. Then step 8 says DO NOT insert the device. 8 is correct, by the way.

    Still, the included ver. 5 drivers do not work with Vista. When you contact the vendor for help, they’ll tell you where the ver. 6 drivers reside. They’re marked 221 thru 321 so you think they don’t work with the 421, but they do. Oh, you need the revised instructions, too. By the way, the included disc says nothing about the software version. You have to watch for it after launching setup.

    So, get ver. 6 drivers or later, get the latest instructions, and don’t plug in until the drivers are fully installed in Vista.

    I asked if the drivers were necessary since Vista wants to provide its own, and tech support said yes, you need to install them.

    I tried tech support’s live chat. They pointed me to newer instructions that said to wait before connecting, but they said nothing about the ver. 5 drivers and Vista incompatibility. After wasting 2 hours installing and uninstalling, I emailed to tech support. I wrote at midnight and when I got up bright and early, I had a URL for the proper drivers and instructions. The final installation was flawless and the device works fine.

  • Review by BOGY.

    I have purchased both the Cirago and this IOGear. Both work perfectly with Windows XP and Vista. The Bluetooth drivers auto load and it makes sharing files and pairing very easy. On your task bar will be a BT icon that you right click for a list of options. The IOGear claims to work with MAC but the Cirago doesn’t. I don’t have a MAC so I do not know if this is true or not (Sorry). The Cirago has a brighter blue light than the IOGear. Also, the IOGear is smaller (But not by much). Both are so small in size they can be left in the USB slot and not removed. The IOGear is easier to remove from the slot than the Cirago (it is the shape of the exposed area that determines this). Here is one other interesting thought. Take a look at the picture of the IOGear. When plugged into the USB the metal part slides all the way in so only the black plastic area is sticking out. That is nice, eh? The Cirago goes in the same but sticks out just a little more than the IOGear (Some metal exposed). However, both function perfectly with USB BT 2.0 and early versions 1.0 & 1.1! Both are backwards compatible. The range doesn’t seem to be different – I have tested both from 20 feet and they work (Document sent to printer). You choose.

  • Review by etibau

    This bluetooth dongle is very nice and small, it has a blue led on it but its not too bright as to bother when used on a laptop.

    I use it with my plantronics 520 bluetooth headset on skype and it works good, I can’t use it too far from the computer (< feet) because I start to get static but that might be the headset I dont know. I don’t know why the other reviewer is saying it doesn’t work on Vista 64-bit, I use it on my new HP dv4t with 64-bit Vista Home Premium with no problems at all. UPDATE: I contacted IOGEAR tech support and they gave me this url ([…]) you should be able to download an update to get Widcomm version 6.x drivers. This is necessary to use Nokia PC Suite on Windows Vista for those Nokia users like me 🙂

  • Review by Bradley Davis

    Bradley Davis
    I got this adapter to use with my new Acer Aspire ONE netbook (one of its few shortcoming being the lack of built-in bluetooth). WOW, is this device tiny! It fits very snugly into a free usb port — it won’t fall or slip out easily, and you can’t even see any of the metal from the usb plug — its just a tiny blue wart on the side of your machine. You’ll hardly know its there! The seems to be little chance you could snag anything on it or break it off like with a larger dongle. The blue LED is easily visible but not excessively bright like on some dongles and devices. It also shuts off when not in use. Seems to be very power efficient, you can just leave it inserted all the time. Range seems fine, comparable to larger bluetooth dongles. Includes excellent Widcomm bluetooth stack software (using with XP) and supports A2DP for my bluetooth headphones. I highly recommend this product for anyone who wants to add unobtrusive bluetooth support to a notebook or netbook.

  • Review by Gadgetjq

    Long story short, the most difficult thing about installing this product is getting it out of the blister pack in the first place.

    The provided instructions (you can actually download or read the manual on the web while you’re waiting for the Bluetooth dongle to arrive) are very clear, the install is a snap….but you’ve read other reviews and know that already.

    Here’s the true beauty of this tiny piece of hardware. It links to practically everything! Because it is not only Bluetooth 2.0 compliant but also backward compatible to Bluetooth 1.1 and also supports stereo audio you won’t have any issues connecting to a Bluetooth mouse or stereo headset.

    Within minutes of the install I had the little (and I mean tiny) GBU421 linked to my Motorola cell phone (audio and dialing from the laptop, no need to ever get the phone out of pocket or purse), a PDA, Garmin GPS Mobile10, Bluetooth headset and a mouse. The crazy thing is IOGear has managed to make this thing work with all the above simultaneously.

    Anyone considering a ‘look alike’ Bluetooth dongle featured by some eBay and other sellers, don’t bother. Either they aren’t 2.0 or aren’t backward compatible (you lose the use of most Bluetooth mice) won’t handle stereo audio and sometimes all the above.

    Very impressive IOGear…and did I mention it’s really tiny?


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