✔High Definition Audio✔ The latest Bluetooth 5.0 technology which ensure the faster, stable and stronger anti-interference. It generates strong FM signal will ensure the sound quality clear. It also adopts A2DP sound processing technology and white noise cancellation (CVC) microphone which can provide you with better stereo music and clear call process. | ✔Hands-free Calling✔ The FM Bluetooth transmitter built-in mic with hands-free calling function. Just press and hold the multi-function button for 2 seconds to wake up Siri or Google voice assistant. Then you can answer/hang up/reject call/search information you want with hands-free. | ✔Fast Charging✔ The FM transmitter has QC 3.0 charge port and 2.4A charge port which supports high speed car charging. It is up to four times faster than the traditional charging ports. Those dual outputs which you can charge your cellphone or other devices. Even use them in the same time. | ✔Colorful Music Player✔ The Bluetooth FM transmitter can play music via Bluetooth/Micro SD Card (≤32GB, MP3, WMA, WAV, FLAC and APE format)/AUX cable. It has a 7 colors LED backlight which is more clearly visible in dark car driving environment and brings pleasant. | ✔More Stable Connection✔ No signal failure will be appeared. Our Bluetooth FM transmitter built with the latest Bluetooth 5.0 technology, the signal transmission and FM signal are more stable and fast. It is compatible with most Bluetooth enabled devices, such as iOS, Android, smartphone and tablet etc. It will also be suitable for all cars/trucks (12 - 24V).