Qmadix QPOP Bluetooth Mini Speaker - Retail Packaging - Black Lightweight portable design, heavyweight sound, loudspeaker output 3W Bluetooth 3.0 supports music and telephone functions Internal microphone allows for full duplex phone calls Built-in rechargeable lithium battery 600mAh, 3-4 hours playing time; 3-5 hours charging time 3.5 to 3.5mm Audio Cable for optional wired connection to your portable audio device, convenient detachable hand strap