Allows you to answer phone calls and play music from your smartphone through your car stereo via FM radio transmission. Programmable frequencies: 87.5-108MHz Suitable for iPhone , iPad, smartphones and other portable devices through Bluetooth Support Bluetooth handsfree phone calls Bluetooth v2.1 Plug into car with 12V/24V socket Dual USB power outlets 5V/2.1A and 5V/1A LED display to show the FM frequency