Features: BT: This speaker supports BT device with A2DP function. Integrated with BT, it can be connected to Smartphone, PC, for IPHONE, for IPAD and other BT devices within 10 meters, bring you high quality music enjoyment. Lamp Function:It can be used as a lantern light when pulled and a torch when turning on the switch, sufficient light source provide you better horizon. Hands-Free: The microphone is equipped with a microphone for hands-free calls, you can answer or end the phone by pressing the button on the phone or on your stereo. TF Card Reader: The multi-functional speaker supports TF card and multi-format music, up to 32G extended memory supported , the speaker enter TF card music playing when blue indicate light flash in TF card playing mode, so that you can enjoy music freely. Duration Time: Built in 2200mAh rechargeable battery, provide up to 8-10 hours music play time and 1000 hours standby time. Furthermore, intelligent solar powered, no charger required in outdoor activities.