TOPTC Flexible 1.0" LCD Wireless Bluetooth Hands-free Car Kit FM Transmitter MP3 Player Play music from USB disk and TF card, TF card reader for USB data line; Voice prompts the caller number when a call comes in; Digital display calling number; For other compatible music device or your MP3/MP4 player, connect to the headset hole using the audio line, also to be able to launch; Normal play can be displayed when the complete state information: EQ, frequency, volume, songs, playing time, playing equipment; Charge for iPhone/ Samsung/ Nokia, etc.