For the universal radio transmission of Bluetooth signal sources such as smartphones or tablets to any car radio ,- Charger for easy charging in a car ,- LED function indicator gives information about the device status ,- Supports microSD cards and USB memory sticks up to 32 GB for playing back MP3 music tracks ,- Signals are transferred via radio at the car radio's specified VHF frequency (to be set manually on the transmitter). ,- The device always stores the last frequency used ,- Modulation type: FM ,- Power supply via integrated cigarette lighter plug ,- Two USB outlets for charging mobile devices (1x of 5V/2.4A, 1x 5V/1A)