C13 Multifunctional Car Dual USB PD Fast Charger Bluetooth FM Transmitter with Atmosphere Light 1. Colorful breathing atmosphere lights, seven-color light self-adjustment, to meet different needs. 2. Support 5V 3.1A fast charging, with dual USB charging ports, while charging does not affect the charging speed. 3. Compatible with a variety of mobile phone sound software APPs, broadcast through car audio, and there is no restriction on mobile phone models. 4. MCU+DSP dual-core processor, compatible with Android and iOS systems, background noise reduction processing makes playing music and mobile phone calls clearer. 5. Compatible with various brands of music U disks, up to 32GB expansion, and the playback mode can be switched freely. (Not shipped with) 6. Power-off memory playback function, automatic connection back. 7. High-resolution, high-performance stereo, no freeze, support MP3FLACAPE and other lossless music, multiple audio format playback. 8. Parameters: Frequency response: 20Hz~15Khz FM transmitting frequency: 87.5-108.0Mhz Bluetooth version: 5.0 Transmission distance: 10-15m Working voltage: 10-24V USB output: 5V 3.1A 5V 1A