Headphones MP3 Player Support: MP3,WMA Support Micro SD highest to 16GB Power: Li-ion battery good hot

Z-868 Headphones MP3 Player (DW-3-066) 

Play high quality mp3 from sd/mmc cards not included Hi-fi soundRechargeable lithium batteryFloding headphonesLcd with tracks informationBattery loader from usb includedFrequency response:15-20HzImpedance:32ohmsSize:40 mm diameterCharging power voltage by usb port:5 V

power voltage:3.7 V (400mah li-ion rechargeable battery)Static state current:<40uAOutput current: <100mAWorking time full of power :5 HoursCharging oltage for 5 V supply by PC USB  Max charging power: 200MaUse earphone also can listen to the music come from headphone with MMC/SD cardUSB input port charge power can read and write the files of MMC/SD cardUSB port:USB 1.1support format: MPEG 1,Layer 3Sampling rate:(Bit Rate)32/44.1/48KHz(8Kbps~320Kbps)SNR: About 70dB(1kHz)sensitivity:108+/- 3dB at 1kHz S.P.LSpeaker resistance: 320ohm+/-10%Speaker size:40mmOutput power:10mW

Headphones MP3 Player with SD Card Slot (DW-3-066)