1. Plug and play: the disc box interface of the original-car audio host is installed in the original-position, which is simple and fast, and perfectly integrated with the original-car. 2. Support HFP Bluetooth hands-free call: You can control the operation of answering/hanging up the phone through the car audio host and steering wheel buttons. 3. Support A2DP Bluetooth music playback: Bluetooth device audio can be easily played through the car stereo. 4. Bluetooth AVRCP control technology: you can use the car audio host (or steering wheel) to control song selection/fast forward/fast backward/pause, which is convenient and safe to control. 5. High fidelity sound quality: Bluetooth host outputs to car stereo through wired connection, eliminating any interference and sound quality loss, and the sound quality is comparable to that of CD. Power supply: 12V vehicle-mounted DC Frequency response: 20Hz to 20kHz, 2dB Power: less than equal 5W Distortion: 0.01% SNR: 95dB Working temperature: -35-85 Color:Black Material:plastic Package Contents: 1 * Bluetooth connection module 1 * disc box harness 1 * microphone 1 * user manual(English version) Only the above package content, other products are not included. Note: Light reflection 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.