Harman Kardon is a pretty popular name in the world of audio. And their Onyx Studio 2 is a pretty popular Bluetooth speaker. Right now, Groupon is offering it up for just $119. Keep in mind that this is a refurbished model, however. The Harman Kardon Onyx Studio 2 is a relatively small speaker, but that doesn't mean that the sound is small, it's actually quite large and has received rave reviews. The sound is so large in fact, that it can fill the entire house with audio. Which is no small feat, to be honest.
There is a 2600mAh battery inside the Harman Kardon Onyx Studio 2. But that doesn't mean it'll perform well when unplugged. It is only rated to get about 5 hours of battery life. So you will need to keep it plugged in for the most part. However, this speaker is not portable, so you'll likely keep it plugged in all the time anyways. Groupon does offer returns on their products. So if you aren't happy with it, or something happens to it, you can return it without any issues. At the time of writing this, Groupon has the Harman Kardon Onyx Studio 2 in both white and black colors, so you can pick and choose which color you want.