Bekhic 3DV9 3D Hi-Fi Bass Wireless Portable Bluetooth 4.0 Speaker Stereo Newest German 3D sound technology, sound better than bose sound link mini 2 and beats pill Bluetooth speakers Built-in Li-ion rechargeable battery for up to 10 hours of playtime Output power: 2W x 2 and frequency response: 150hz-15khz Leather touch rubber that surrounds the speaker