1. Main functions 1, double decoding support MP3 /WMA/WAV/FLAC/APE format music, double decoding + lossless decoding; 2, support Bluetooth wireless reception function, distance 10-20 meters (transmission distance and penetration software adjustable); 3, with REC recording function, recording BT/FM/LINE IN USB or TF card storage, REC folder automatically generated; 4, with dancing three sections of color LED digital tube display, support to replace the playback/suspension of the screen LED; 5, support TF card, support USB interface (U disk); 6, power off memory function, power off memory: power on function state mode, volume level, track; 7, support 5-10 meters distance infrared remote control operation; 8, support external audio input LINE IN; 9, support radio FM, receiving frequency band (87.5MHZ-108.0MHZ), can be adjusted for the target market frequency band; 10, button: four buttons, composite function, VOL-/ AUTO/VOL+ / MODE; 11, volume level: 50; Second, recording function description 1, long press the MODE button to start recording, and then long press the MODE button again to cancel the recording function; 2. Press and hold the PLAY/PAUSE button to play the recording file; 3, recording more than need to connect a storage device, such as: U disk or TF card; Three, key operation details: VOL- button: Press and hold to turn down the volume; In the USB/SD/FM/BT state, short press once for the previous song or the radio station before FM; In USB/CARD state, double-click the music to play the previous music file; VOL+ button: Press and hold to turn up the volume; In USB/TF/FM/BT state, short press once for the next song or FM after a radio station; In USB/CARD state, double-click the music to play the next music file; PAUSE button: In the USB/SD/BT/AUX/FM state, short press once to pause and play; In the state of radio, long press for automatic radio receiving station and parallel stations, after receiving station automatically play the radio of the first frequency point of the saved radio station; MODE button: Click once: Function conversion; Convert Bluetooth-TF Card-USB-radio-audio input; When USB/CARD is plugged in, long press the MODE key to record the internal recording when BT/FM/AUX is playing.