Bluetooth-compatible 5.0 Audio Adapter USB 3.5mm Jack Music Receivers Embedded Microphone Wireless Handsfree for Music Headphone Feature: 1. Wireless:Car Bluetooth-compatible music receiver (hands-free) is a high-tech wireless product 2. Music Receivers: Receive music through mobile phone, TF card or Bluetooth-compatible transmitter. 3. Apply to:This music receiver can be used with almost all audio receivers with input plugs, including car equipment. 4. With Microphone: The product is equipped with an embedded echo cancellation microphone, which can easily switch between music and phone calls with one button. 5. Application:You can receive music from smartphones and MP3s in your home speakers or car audio system. Enjoy car music, call solution, use your smartphone to make calls and listen to music through car stereo. Tap to make a call, listen to music stored on your phone, or even play Internet radio. Specification: Interface: USB,3.5mm Wireless Type: Bluetooth-compatible Content: Audio Model Number: Receiver Product Model: AUX 3.5mm Bluetooth-compatible Receiver Product material: Plastic + metal Product color: black Interface type: 3.5mm Bluetooth-compatible version: Bluetooth-compatible 5.0 Featured functions: support connecting headphones, connecting mobile phones, connecting speakers, connecting cars Product size: About 5x2x1cm/1.96x0.78x0.39in Product bare weight: 11g (Bluetooth-compatible receiver + metal adapter) Total product weight: 29g (Bluetooth-compatible receiver + metal adapter + cable + manual + PP bag packaging) Product packaging: Sealed PP bag Product Features: Bluetooth-compatible Receiver, Car Bluetooth-compatible Receiver, Car Bluetooth-compatible Receiver, AUX Bluetooth-compatible Receiver, Audio Adapter Instructions for use: 1. Power on/off (1) Power on: Press and hold the On/Off button for 3 seconds until the blue LED light starts flashing. (2) Power off: Press and hold the On/Off button for 5 seconds. The red LED light will turn on and then turn off. 2. Pairing If this is your first time using this device, configure it first. (1) To enter pairing mode, press and hold the On/Off button (button 1) for 5 seconds until the red and blue LEDs flash. (2) Search for Music Receiver on your phone or compatible transmitter. Long press a button to power on, and it will automatically search for compatible transmitters; if connected to an Apple or Android device, there is no need to enter any password, and the LED light below the button will indicate the device and charging status. (3) The devices should now be able to recognize and pair with each other. When paired successfully, the LED on the music receiver will slowly blink blue. (4) After pairing is complete, some devices require a password or passcode, please enter "0000". (5) After the pairing is successful, it can be turned off. To reconnect, just turn them on, no need to pair again. Note: 1. Read the user guide of the transmitter or mobile phone to learn how to turn on/off the Bluetooth-compatible wireless technology. 2.