Features: Dual high definition speaker drive units, 2.0 Two-Channel 360 degree surround super bass and stereo sound effect, feel the shocking bass of the music. Extremely long standby and using time, the talk time / playback time up to 12 hours. Built-in sensitive microphone, handsfree support to answer incoming phone calls even when it play music or when youre driving, its very convenient. Built-in Card Slot and Flash Drive Slot, Support TF Card / Flash Drive Play Mode, Even You Do Not Own A Device With BT Function, You can Also Insert A TF Card With Songs Downloaded To Play Music . Support AUX Line-out Music Play Mode, Audio Cable Connect The Speaker To Mobile Phone Or Tablet PC To Play Music. Specifications: Color: black Size: 430*65*65mm BT Version: V5.0 Frequency Response: 70Hz18KHz Cell Capacity: 2000mAh Play Time: Up to 12 hours Audio Output: 8W*2 Packing List: 1 * Speaker