Tips: ZF360B With Microphone,Support Handsfree Calling When RX Mode.(TX Mode Don't Support) VAORLO ZF-360B 4-IN-1 Bluetooth Audio Transmitter Receiver: ZF-360B is a Bluetooth transceiver developed with the latest Bluetooth version 5.0. This product can be used as a Bluetooth audio transmitter to wirelessly transmit the sound of TV and other audio sources to Bluetooth headsets or Bluetooth speakers (on computers and Android systems). Under, support the direct transmission of audio with data lines, without the need to plug 3.5mm audio cable). It can also be used as a Bluetooth audio receiver to instantly turn a wired speaker into a Bluetooth speaker, freeing you from the shackles of cable and enjoying wireless music. User Manual(4 IN 1 Mode): 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). 4) Receiver mode With Microphone Handsfree Calling.(TX Mode Don't Support) Specifications: Model: ZF-360B 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 Package Content: 1*ZF-360B Bluetooth 4-IN-1 Audio Adapter 1*3.5mm Audio Cable 1*USB Charging Cable 1*User manual 1*Retail Package