Wireless Bluetooth FM Transmitter MP3 Player USB Car Fast Charger Adapter with Built-in MIC Hands-Free Calling Dual USB Charger 5V/3.1A and 1A Support SD Card USB

*1. Working Voltage: 12-24V *2. Current: 3.1A(Dual USB) *3. Display: digital *4. Frequency: 87.5-108MHz *5. Effective Distance: about 10.5 meters *6. Bluetooth: Bluetooth 5.0 *7. Memory Expansion: U disk (Up to 32G) *8. Launch Distance: