SD-890, 4 in 1 MP3 Foldable Headphone (SD Card Headphone + FM + Wired headphone + Rechargeable Li-ion Battery), White

1) Power supply 3.7V (3.7V 500mAh Li-ion charging battery) 2) Static state electric current less than 40uA 3) Operation electric current when headphone output less than 80mA 4) Charging use computer USB port, the maximal charge electric current 200mAh 5) Support file format: MP3 6) Sampling rate: (Bit Rate) 32/44.1/48KHz (8Kbps~320Kbps) 7) S/N rate: about 70dB (1 KHz) Accessories: 1) Audio transfer cable 1pc 2) USB charging cable 1pc 3) TF card transfer to SD card cover 1pc