1. Size: 74*37*36mm weight: 31g2. Bluetooth 5.0, JL AC69663. Input: DC12V-24V4. Output: USB-A 1: 18W (QC/FCP/AFC) USB-A 2: 5V/1.5A5. Support Bluetooth, U disk playback6. Working principle: the mobile phone connects to the transmitter via Bluetooth, and the transmitter connects to the car speakers via FM
