Item Type: BT Aux Adapter Cable Material: Zinc Alloy, ABS Cable Length: Unstretched: Approx. 30cm / 11.8in, Stretched: Approx. 120cm / 47.2in Model: M02 BT Name: M02 BT Version: 5.1 Sound Response: 20Hz-20kHz Frequency Range: 2400-2483.5MHz Output Power Range: 33mW RL=16Ω SNR: ≥90db Effective Transmission Distance: ≤10m/32.8ft Output Interface: 3.5mm Power Interface: USB 1、[Add Bluetooth Capability] The Bluetooth AUX adapter is designed to convert your home or sound system, or speakers into Bluetooth enabled hands free devices. If you want to play music or listen to phone calls through your car speakers, but your vehicle is not equipped with Bluetooth, the adapter can be used.  2、[Bluetooth 1 And HiFi Stereo] 5mm Bluetooth AUX adapter with the latest Bluetooth V1 chipset, providing 10m stable connection without delay. Supports SBC codec for clear and pleasing sound, for listening as well as speaking.  3、[Hands Free Calling] This car Bluetooth AUX receiver has a built in microphone that allows you to enjoy hands free calling directly through your car speakers. You don't have to look at your phone while you're on the move, ensuring safer driving.  4、[Plug And Play] The 5mm car Bluetooth receiver is very easy to use. Simply plug it into the 5mm auxiliary jack and power it through the USB port, no batteries needed, no worries about low battery and battery life. When you get in the car, the AUX will automatically connect to your phone.  5、[Durable And Portable] The car Bluetooth adapter cable is made of zinc alloy connector for more durability. 0.3M to 2M ABS flexible cable, more flexible to use, will meet your needs in different scenarios. Mini size, won't take up extra space in your car.