Specifications: Model: ZF-360;  Bluetooth version: Bluetooth V5.0+EDR;  Bluetooth profiles: AVRCP(receiver mode only), A2DP;  Input parameter: 5V 1A;  Charging port: Micro USB;  Receiver mode play time: 10 hours;  Transmitter mode play time: 7 hours;  Charging time: 1 hour;  Working distance: 10-15m;     User Manual: 1) Transmitter mode;  a) Connect the audio interface marked by 'TX' to the audiosource devices (TV, computer, radio, MP3, etc.) with 3.5mm audio cable;  b) Turn the toggle switch to 'TX' side, long press the 'Power' button 2 seconds to start up, and the red indicator light will flashes slowly;  c) Turn on the Bluetooth receiving device you want to pair and enter the Bluetooth pairing mode. The adapter will automatically pair with it, and the red indicator light will stay on after the connection;  Note: The '+, '-' and 'Power' buttons are invalid in this mode;  2) PC transmitter mode;  a) Connect the USB charging port and the computer USB port with USB data cable;  b) Turn the toggle switch to the 'TX' side, long press the 'Power' button 2 seconds to start up, and the red indicator light will flashes slowly;  c) Turn on the Bluetooth receiving device you want to pair and enter Bluetooth pairing mode. The adapter will automatically pair with it, and the red indicator light will stay on after the connection;  Note: '+' button: next track (press), just can control music player; '-' button: previous song (press), just can control music player; 'Power' button: pause/resume music (press),just can control music player;  (in this mode, the '+' '-' button cannot control the volume ofthe computer system.);  3) Receiver mode;  a) Connect the audio interface marked by 'RX' to unBluetooth-enabled speaker or headset with 3.5mm audio cable;  b) Turn the toggle switch to the 'RX' side, long press the 'Power' button 2 seconds to start up, and you will hear the prompt 'Bluetooth receiver mode', and the blue indicator light will flashes slowly;  c) Turn on the phone's Bluetooth function, search for and connect to the Bluetooth device named 'ZF-360', and the blue indicator light will stay on after the connection;  Note: '+' button: next track (press), volume up(press&hold);'-' button: previous song (press), volume down(press&hold);'Power' button: pause/resume music (press);    Connect  Issue: Automatic connection- After the product is turned on, it will automatically pair the last connected device, and if it is not connected within 3 to 5 seconds, it will automatically enter the searchable pairing status;  Disconnection- When the Bluetooth function of the mobile phone is off or the Bluetooth is out of the connection range, the receiver will automatically enter the pairing state to wait for connection. If it is not connected to any device within 5 minutes, the receiver will automatically shut down;  Re-connection- In the connected state, press the '+' and '-' buttons at the same time, the voice prompts 'Disconnect', the red and blue lights flash alternately, the receiver waits for the connection;at this time, press the '+' and '-' buttons at the same time,you can re -connect the device you just disconnected;     Package Content: 1 x ZF360 Bluetooth 5.0 Adapter;  1 x 3.5mm Aux Cable;  1 x Charge Cable;  1 x User Manual;  1 x Retail package