Zoo Tunes Compact Portable Bluetooth Stereo Speakers for MP3 Players, Tablets, Laptops etc. Panda Bear Enjoy up to 10 Hours of music with this best bluetooth speakers portable with the Built-in rechargeable battery. This speaker I powered either by the built-in rechargeable battery or a USB cable. Charges through a standard Micro-USB Cable (cable included) 3.5mm Line-in AUX jack to use with all non-Bluetooth devices such as computers, phones, MP3/4, CD players, etc. Compatible with most iOS and Android Devices like Apple iPad, iPhone and iPod, Samsung Galaxy, Nexus, Kindle, Surface etc. Other Features: Volume Control, On/Off Switch, 2.0 Watts total output, 40MM x 2 full-range neodymium drivers, Illuminated charging indicator. Approx. Dimensions: 3.7" x 3.7" x 3.2" (94x 94x 81mm)