Features:  1. DC 5V slot, (standard Micro USB V8 charging cable for power charging).  2. TF slot: It can decode and play MP3 format audio when put TF card into the slot.  3. USB slot: It can decode and play MP3 format audio when put the USB card into the slot.  4. LINE IN slot: Use the Mini 3.5 head input through outside devices.  5. When play music, Press short for last song, long press to turn down the volume.   6. When play music, press short for next song, long press to turn up the volume.   7. When play music,(USB card/TF card/Wireless/line in), press short for play/pause. In FM mode, press short to search station automatically, press again to stop searching. Under Wireless mode with mobile paired, when call coming, press short to answer a call hands-free, press again to hand up, press twice to ring up a call.   8. When play music,(TF card/Line in/USB card/Wireless), short press to switch model, press long for power on, press long again for power off. NOTE: In the FM mode, put in micro charging cable to get better FM radio station.    Specifications:  Bluetooth Version: 3.0+EDR;  Transmission Distance: 10 meters;  Battery Capacity: 1200 mAh;  Built in Voltage: 3.7V;  Play Duration: 3-4H (Depends on playing volume);  Waterproof Level: IPX5, means you cannot throw it into water ;  Frequency Response: 150hz-20khz;  Speaker Power: 5W * 2;  Package Size: 18*8*8cm ;  Package Weight: 0.7kg;    Package Included:  1 x Bluetooth Speaker;  1 x Manual;  1 x Aux Cable;  1 x Charging Cable