?Wide Compatibility?This Bluetooth car music is compatible with a wide range of Bluetooth devices such as iPhones, Android smartphones, tablets and more, as well as all cars and trucks with a 12-24V power supply. Its extensive compatibility offers great flexibility of use for an enhanced driving experience. Voltage Detection & Ambient Light?The voltage will be displayed when you plug in the Bluetooth adapter for car, which is convenient for you to grasp the health status of the car battery and ensure your driving safety. The soft blue LED lights will stay on for easy visibility at night and make your car's interior layout look cooler and more attractive. ?Siri Google Assistant & Hands-Free Calling?Built-in microphone, you can use Siri or voice assistant anytime, and the Bluetooth transmitter car will broadcast navigation once connected to your smart device. Easily answer/hang up/reject/redial calls with just one push of the MFB button. ?Enhanced Bluetooth 5.3?With its advanced Bluetooth 5.3 technology, RIWUSI's car Bluetooth fm transmitter optimizes the transmission delay and connection failure problems encountered with the older Bluetooth 5.1 version. This technology offers a faster, more stable and smarter connection with reduced loss of sound quality, for an uninterrupted call and music experience. Dual Port & AFast Charging?This FM Transmitter is equipped with a Type-C PD 30W port and a QC 3.0 18W port, offering simultaneous fast charging for two devices. The Type-C port can quickly charge smartphones, six times faster than a standard charger with an output of up to 30W. The QC 3.0 port recharges compatible devices to 80% in just 35 minutes.