Bluetooth speaker

Astonishing Sound, 12-Hour Playtime, USB Charging, Built-In Microphone, Hand-free Calling, TF card slot, and 3.5mm AUX cable High capacity lithium battery for up to 12H playtime at 2/3 volume on a full charge. Batterylife varies and may be less than 12 hours for some reasons. EDR technology improve Bluetooth transmission, 3 times as high as that of Bluetooth 4.0 and reduces the power loss, so to ensure faster and more stable Bluetooth transmission. Support U disk and TF card in-put, and AUX in-put. Note: Please charge the bluetooth speaker before you use it for the first time.