Description:  Product name: Bluetooth 5.0 decoder.  Power supply: DC3.7-5V.  Rated input: DC5V /500MA.  Input: Bluetooth input, U disk input, 3.5MM external audio input.  Size: 88*25MM.     Features:  - Color digital screen shows music spectrum.  - Support MP3 and APE lossless decoding.  - Bluetooth 5.0 compatibility is good, 0-20 meters distance (barrier-free).  - Remote control, switch 10M infrared remote control at will.  - With FM radio frequency spectrum display.  - Support TWS.     TWS wireless interconnection steps:  Turn on two Bluetooth 5.0 decoders (AVN-757) to enter Bluetooth mode, press the play button twice (only one), and immediately connect to the other one after hearing the prompt, turn on the mobile phone Bluetooth search for Bluetooth devices (AVN -757) Click to connect to achieve Bluetooth stereo.     Key Function:  POWER: Standby (STANDBY) ON/OFF.  MODE: Press this key to cycle through input USB, SD, BLUE, FM, LINE.  PREV: In the USB/SD/BT playback state, short press to select the previous song, long press to rewind (BT is invalid, short press to select the previous radio station in the radio FM state. Long press to search backward, find the station to play Current radio station. AUX status is invalid.  NEXT: In the USB/SD/BT playback state, short press to select the next song, long press to fast forward (BT invalid).  In the FM state, short press to select the next station. Long press to search forward, find the station and play the current station, AUX status is invalid.  VOL+: volume up VOL-: volume down.  REP: Enter the loop mode during USB/SD playback, and enter ALL (all loop) when the loop key is pressed shortly.  ONE (single loop)FOLDER (current folder loop) Random (random play). NORMAL (Cancel the loop function, enter the array play).  STOP: Stop playing in the state of USB/SD card, press the play button to start playing from the first song. Other status is invalid.  MUTE: press mute in all states, press again to unmute.  EQ: USB/SD state is sound field mode. NORMAL, BASS, ROCKPOP, ROCK , JAZ, CLASSICm, CUR .  PLAY/PA1SE: In the USB/SD/BT playback state, short press once to pa1se, press again to play,  Press this button during radio reception to enter the automatic search station .  0~9: Do the direct selection key on USB/SD. More than 10 consecutive input numbers to be selected. In FM shape.  Select the saved radio station. You can also press the numeric keys to directly enter the radio frequency to play the radio station.     Package Included:  1 x Bluetooth Decoder.  1 x Remote Controller