1.Play the music in the TF(Mini SD)card 2.Support MP3 WMA format music 3.USB card read function, can read-in and read Frequency response: 20 to 20kHzSNR: greater than 80dBSpeaker input power: 2 x 10mWUSB interface: USB 2.0Supporting audio format: MP3 and WMASupports: microSD (TF) cardBattery working time: about 5 hoursDifferent batteries can be usedPower: 3.7V, 300mAhLi-ion batteryConnect with PC and can read and write data to microSD/TF cardUse high-fidelity decoding chips structure design and can provide clear musicWearing is comfortable 

TF Card Reader MP3 Headset