FM Transmitter - Bluetooth Car Steering Wheel Handsfree MP3 Player Built-in FM transmitter frequency range is 88.1MHz to 107.9MHz, the earpiece receiving frequency is 97.8MHz. Adopt 2.4G third generation CSR Bluetooth version and transmitting distance is beyond 8M, support HSP (Headset Profile), HFP (Handsfree Profile), A2DP (Advance Audio Distribution Profile) and AVRCP function. Display incoming phone number and voice reminding, built-in speaker and rechargeable battery. Can answer / hang up / pick up call by wireless earpiece on the unit (pick up call frequency is 88MHz). High resolution LCD screen display frequency, song name, lyrics and incoming phone number. If the power is off, it would memory the song, frequency, volume when you next open it.