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 wirelely transmit the sound of TV and other audio sources to Bluetooth headsets or Bluetooth speakers (on computers and Android systems). Under, support the direct transmiion 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 wirele music. User Manual(4-IN-1Mode): 1) Transmitter modea) 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 pre 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 modea) Connect the USB charging port and the computer USB port with USB data cable.b) Turn the toggle switch to the 'TX' side, long pre 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 (pre), just can control music player; '-' button: previous song (pre), just can control music player; 'Power' button: pause/resume music (pre),just can control music player.(in this mode, the '+' '-' button cannot control the volume ofthe computer system.)3) Receiver modea) 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 pre 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 (pre), volume up(pre&hold);'-' button: previous song (pre), volume down(pre&hold);'Power' button: pause/resume music (pre).4) Receiver mode With Microphone Handsfree Calling.(TX Mode Don't Support) Specifications: Model: ZF-360BBluetooth version: Bluetooth V5.0+EDRBluetooth profiles: AVRCP(receiver mode only), A2DPInput parameter: 5V 1ACharging port: Micro USBReceiver mode play time: 10 hoursTransmitter mode play time: 7 hoursCharging time: 1 hourWorking distance: 10-15mPackage Content:1*ZF-360B Bluetooth 4-IN-1 Audio Adapter1*3.5mm Audio Cable1*USB Charging Cable1*User manual1*Retail Package Connect Iue: 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, pre 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, pre the '+' and '-' buttons at the same time,you can re -connect the device you just disconnected.Note:1) No driver required when using on the computer.2) If there is a prompt that device cannot be recognized when transmitting audio on the computer, it means the USB port is not properly plugged in.3) No need to use 3.5mm audio cable when transferring audio from computer with USB data cable.4) When using USB data cable to transmit audio on the computer, the volume of the computer system can not be adjusted, only the volume of playback software (music player,video player) or Bluetooth speaker (Bluetooth headset) canbe adjusted.5) This device TX Mode does not support voice calls or voice aistantfunctions.