Description: Name: Car Bluetooth-compatible Transmitter Bluetooth-compatible: V5.0 Display: dual-screen digital tube display Charging interface: support USB 3.1A fast charging PD interface: support PD fast charge Voice assistant: support voice assistant function One-key power on and off: support one-key soft power off, support any key to power on Luminous lights: support RGB lights Battery function: support battery voltage detection Battery memory: automatic power-off memory function FM function: support FM stereo transmission technology U disk: support U disk playback TF card: support TF card music playback Playback format: support WMA, MP3, WAV, FLAC music format files Bluetooth-compatible format: Bluetooth-compatible supports A2DP, AVRCP, HFP, HSP Hands-free function: Bluetooth-compatible hands-free calling Stereo: support Bluetooth-compatible stereo music DSP technology Frequency: 87.5-108.5mhz