Wide Compatibility and Security: This transmitter can be paired with all Bluetooth-enabled devices as a hands-free kit, including , , , , and other smartphones, etc. There is also a vehicle status monitoring function, which is and more . For 12V , 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- connection between the mobile phone and the car Bluetooth adapter. When using the car Bluetooth adapter, the connection speed and stability are 2 faster than the 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 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. -SD card (32G). 3. U disk (32G). Support WMA, MP3, WAV, FLAC 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 safety.For 24V , when the battery voltage is lower than 23.1V or exceeds 27.3V, it will prompt that the voltage is abnormal.Color: blackMaterial: plasticPackage Contents:1 x Bluetooth car adapterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.