ITEM NAME:Bluetooth Car Kit Handsfree 3.5mm Jack Aux Audio Headphone Receiver Adapter Product Description Description: Specification: Bluetooth V4.0 + EDR, Note: Quasi-transmission distance is 10m in the field environment Support Bluetooth Hand-free Call Function Support Bluetooth A2DP stereo Frequency: 2.4 GHz 3.5mm stereo input socket Sleep mode, energy saving Power Supply: Charging with Mini-USB Cable Working hours: up to 6 hours Product size: 60*25*12mm/2.36*0.98*0.47'' Packaging size: 120*50*25mm/4.72*1.96*0.98'' Packaging weight: 37g Charging: 1. Connect one end of the supplied USB cable to the mini-USB input interface of the Bluetooth music receiver. 2. Connect the other end of the USB cable to your computer, notebook or USB power converter, when the LED light of the Bluetooth music receiver turns red, indicating that it is charging. 3. When the charging is over, the red LED lights will go out, providing up to 8 hours of playback time at full power. Pairing: 1. Enter the pairing mode and press the switch button for 5 seconds until the red and blue LED lights flicker at the same time. 2. Find this Bluetooth Music Receiver on your mobile phone or related transmitter. 3. At this time, the device is paired and connected. When the connection is successful, the LED light of the Bluetooth music receiver turns blue and flickers slowly. 4. For some devices requiring a paired password, please enter "0000". 5. Once the pairing is successful, the device can turn off the power supply and no need to reconnect next time. If Paired: 1. Boot-up: Press the switch button on the Bluetooth music receiver for 3 seconds until the LED lights turn blue and flicker to complete boot-up. 2. Turn off: Press the switch button for 5 seconds, then the red LED lights will be on for a long time, and then turn off. 3. Note: Please read your sender or mobile phone instructions carefully to find out how to use Bluetooth wireless technology. If you want to use this Bluetooth music receiver to con.Connect the other end of the USB cable to your computer, notebook or USB power converter, when the LED light of the Bluetooth music receiver turns red, indicating that it is charging. Connect one end of the supplied USB cable to the mini-USB input interface of the Bluetooth music receiver.