【Upgraded Built-in Chip & Bluetooth V5.1】The Bluetooth FM transmitter for car with 2x data transfer speed, 4x transmission range, 8x broadcast massage capacity, will bring you faster response, more stable connection, lossless transmission | 【Hands-free Calling & Voice Assistant】The Bluetooth FM transmitter for car with echo cancellation and CVC noise suppression technology, can provide you with a smooth and crystal clear calling. Features Siri/Google Assistant & voice navigation system | 【Hi-Fi Music with 3 Playing Modes】The Bluetooth car adapter is designed with built-in high-performance microphone, so you can enjoy clear stereo sound music via Bluetooth/ USB Flash Drive(≤32GB) / microSD Card(≤32GB) . The car music adapter bluetooth supports MP3/WMA/FLAC/APE/WAV formats | 【2 USB Port with QC3.0 Fast Charge】You can charge 2 devices simultaneously with our wireless bluetooth car adapter. The car bluetooth adapter supports QC3.0 fast charge, 4 times faster than traditional ones. Another 5V/1A charge port also functions as a U disk port (up to 32GB) for playing music | 【Broad Compatibility & Security Protection】The car Bluetooth adapter is compatible with iPhone, Samsung, Huawei, iPad and other Android Smartphones. The radio transmitter Bluetooth is suitable for 12-24V powered vehicles. Featuring car voltage detection, over current, over voltage, over load, over temperature, short circuit protection, the fm bluetooth transmitter car is safe use