Fangrui Product Details 1. Bc32 Dual Usb Charging Bluetooth Hand-free Car Charger Fm Transmitter Mp3 Music Player Car Kit, Support Hands-free Call & Micro Sd Recording & Voltage Detection 2. Features: 3. Supports Full Fm Frequency 4. Auto Power-off Memory Function 5. Supports (usb1+usb2)2.4a Charginglcd Display 6. Supports Usb Disktf To Play Music 7. Supports Answer, Reject, Hang Up, Redial Through Hands-free 8. Private Conversation 9. Aux Inputoutput 10. Supports Sirivoice Assistant Function 11. Supports Music Play From Folders -108 Mhz 12. Technology Parameter 13. Rated Voltage: 12v-24v 14. Limited Voltage: 9-32v 15. Usb1 +usb2 Output: 5v2.4a 16. Work Temperature: Max<60 Degree 17. Music Fomat: Mp3mmawav 18. Support U Disk, Tf Card Capacity: 1g-32g 19. Bluetooth Version: Version 4,1+edr 20. Transmit Frequency: 76mhz-108mhz 21. Transmit Effective Distance : 0.5-2m 22. Bluetooth Effective Range: <10m 23. Lcd Resolution: 128x64 (1.8 In)