DBEST Rubberized London Solo Bluetooth Rechargeable Mini Speaker - Black/Red (PS4011BT-BRB) Wireless Music Or Voice Streaming Engineered For Exceptional Clarity Of Sound Powerful, Built-in Amp For Surprisingly Loud Volume Aux Input High-capacity Li-poly Battery (400mah) For Up To 20 Hours Wireless Or Up To 40 Hours Wired Playback Wireless music or voice streaming Engineered for exceptional clarity of sound Powerful built-in amplifier for surprisingly loud volume Line input for audio sources without Bluetooth connectivity High-capacity lithium polymer battery (400mAH) for up to 20 hrs. wireless or up to 40 hrs. wired playback Compatible with all devices featuring 3.0+EDR Bluetooth or 3.5mm audio jack Compatible with all standard USB chargers (PC, Car, Mains)