PRODUCT SPECIFICATIONS BT : V5.0 Working distance: 10M SNR:290db Battery: 3.7V 1200mAh Normal volume playing time:3H Speaker driver: 45MM*2 Power: 5W*2 Frequency response: 120HZ-20KHZ Unit size:72.6x72.9x178.7mm Unit weight: 490G Charging:5V/500mAh PRODUCT FEATURE: 1.International advanced BT chip and circuit design tech-niques, support all wirele devices. 2.With FM function, can search radio station broadcast auto-matically. 3.With Hi-Fi speaker, to make sure the clear and bright sound. 4.Support Micro SD card and USB card, play MP3 format audio. 5.The wirele working distance is 10 meters. 6.With AUX line in, can directly connect the outside devices,for example, tablet PC/TV/cell phones. 7.It will close automatically after 30 mins if disconnect BT & torchlight not working 8.A variety of flashing LED lights with different colors, color lights flash follow the melody. KEY AND SLOT FUNCTION: 1.DC 5V slot: Use the 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.AUX line in slot: Use the Mini 3.5 head input through outside devices. 5.Power switch: Pre long for power on /power off.When play music,(USB card/TF card/Bluetooth/ine in), short pre for "play/pause". In FM mode, pre short to search station automatically, pre again to stop searching. Under BT mode with mobile paired,when call coming, pre short to answer a call hands-free,pre again to hand up,pre twice to ring up a call. 6.When play music, Pre short for last song, long pre to turn down the volume. 7.When play music, pre short for next song, long pre to turn up the volume. 8.short pre to swith model (USB card/TF card/BT/line in/FM). 9.pre short for option of the LED flashing light ,pre long to close the LED light. NOTE: In the FM mode, put in micro charging cable to get better FM radio station.USB DISK/ TF CARD should be format FAT32.