Supports USB and SD/MMC cards car mp3

Key Specifications/Special Features:

Compatible with all Bluetooth phones
CVC technology to eliminate noise and restrain echo
Supports line-in/out
Supports USB and SD/MMC cards (up to 4GB)
Can play music in the phone through Bluetooth
Supports MP3 and WMA file formats
LCD display
Supports full frequency transmitting (87.7 to 108.0Hz)
Optional EQ and circulation modes
Supports last call redial and voice dialing
Mute function to enjoy private talking
Automatic connection
Built-in microphone
21 keys remote control