THD:<1%

SNR:≥85 db

Impedance:32 Ω

USB Port: USB2.0

Driver Unit:Ω40mm

Support format:Mp3

Charging Time:3 hours

Support capacity:≤16 G

Frequency Response:20 Hz—20 KHz

FM Frequency range:87.5MHz—108MHz

Power Supply:3.7 V 400 mA Rechargeable Li Battery

Working Time:6 Hours (Based on the volume at 1/3 leverl)

Features:

Support TF card，support:≤16 G memory card.

Support FM.radio，and the signal is very stable.

With lithuim battery inside，after charge，it can play music about 4 hours continuously.
Using the connected wire to LINE IN， you can connect the earphone to computer or cellphone.

Support directly download.Put the memory card inside the earphone，and then it can be fouded by your computer. After this， you can download songs.