Wide Compatibility and Security: This transmitter can be paired with all Bluetooth-enabled devices as a hands-free kit, including , tablet, , , and other smartphones, etc. There is also a vehicle status monitoring function, which is and more reliable. For 12V cars, when the battery voltage is lower than 11.5V or exceeds 14.9V, it will prompt that the voltage is abnormal. Bluetooth 5.0 Stable Connection: The Bluetooth 5.0 chip establishes an ultra-secure connection between the mobile phone and the car Bluetooth adapter. When using the car Bluetooth adapter, the connection speed and stability are 2 times faster than the old version, which effectively solves the problems of music delay and signal interruption. QC 3.0 Super Fast Charging: This car bluetooth FM transmitter supports charging more than 2 devices at the same time. The Bluetooth car adapter is equipped with 1 Quick Charge 3.0 socket, which is 4 times faster than standard chargers, 1 additional universal USB charging port and 1 TF card slot. 3 Music Playing Modes: Support 3 music playing modes, with A2DP function. 1. Bluetooth pairing music. 2. Micro-SD card (32G). 3. U disk (32G). Support WMA, MP3, WAV, FLAC format files and Hi-Fi stereo system. High-Quality Hands-Free Calling: Provides a stable Bluetooth connection, built-in microphone, and Noise Cancellation () technology for hands-free calls and music. The Bluetooth FM transmitter also supports voice navigation to driving . For 24V cars, when the battery voltage is lower than 23.1V or exceeds 27.3V, it will prompt that the voltage is abnormal. Color: black Material: plastic Package Contents: 1 x Bluetooth car adapter 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.