Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Portable, but powerful!

This is a nice piece of speaker. It fits nicely on LCD screen of a laptop. You won't believe the sounds that it produced. Amazing! I would say you can hear the sound as far as 100ft away. It really work well if you need to do a presentation in a big classroom that requires louder sound. It also comes with a pouch that you can store the device if not in use. Connection is simple. Just plug it to any usb port or use its external battery pack. AC adapter is an optional accessory which is somewhat disappointed consider the price it is selling for. Overall, I think this is a good investment if you need to produce louder sound when using a laptop!