CY-862 4-Channels Wireless FM Transmitter with Car Charger Support wide FM wave range (106.7 107.1 107.5 107.9MHz) 5.Flexible manual channel setup available, the lowest frequency channel can be to 0.1MHz 6.Signal transmission range: 10M 7.DC 12V power connector. No need any connection; this product can transmit MP3 or other music devices audio signal to your car audio wirelessly.