Out of the box, this speaker had some juice, so decided to turn it on and try it out on my desk. The sound blasted my ears right away (for some reason was turned up to max out of the box), but it impressed me with how loud it got. I never really thought Rosewill made anything other than computer parts, so was surprised to see this. The device comes with a Bike mount hardware, charging cable (Micro USB Type B to USB A), Micro USB Type B to Aux, a Carabiner and a Controller that connects via the Aux port to control playback while biking. It can play music through Bluetooth, MicroSD card (yes it has a slot), FM Radio or Aux cable. It is a decent sized speaker, but it seems to be best used attached to a backpack or a bike (although it can sit on a desk as well). The speaker also can answer phone calls as it has a built in speaker. Music sounds quite nice on this, while not high end, it does the job for what it is meant for. Bass is quite nice as it has a built in subwoofer as well. Need a charge of your phone? This speaker also doubles as a 6000 mAh battery bank. Want to play music in stereo with more than 1? This speaker also offers that with a pairing option to pair it with another.
Attached to my wife's laptop. Working good for about a year.
This is exactly what I wanted, something to just bring to a table and start up some music. Decent volume range, decent bass, great price.