1. Alloy frame technology, better product texture.2. The ring-shaped guide aperture design, the blue light will light up after the Bluetooth pairing is successful, which is more intuitive and reduces the customer complaints of the Bluetooth pairing.3. Large knob design, click to answer/hang up the call, turn right for one song, and left for one song. In the driving mode, the user can easily activate the Siri intelligent voice by long pressing.4. Using the latest Bluetooth 5.0 chip, high-sensitivity microphone, CVC noise reduction technology, the transmission distance is longer, and the DSP signal processing technology makes the call clearer.5. Innovative base, the base is designed with Buckle , users can stick it on any position of the center console of the car according to their own preferences, and it is convenient and easy to remove.6.CVC noise reduction technology, high-fidelity Bluetooth hands-free effectWorking voltage: 5(V)How it works: USB poweredFrequency Response: 20-20kAmbient temperature: 20 ( Celsius )Colour:blue+blackMaterial:ABSPackage Contents:1 * Bluetooth receiverOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.