Features:

Memory Flash: 1GB
Digital formats supported: MP1/MP2/MP3/WMA/WMV ASF/WAV
PC interface supported: USB2.0 PROTOCOL (FS)
Playtime: 5~6 hours
Recharging time: 3 hours
Maximum input power rating: 5VDC,150mA
Voice output power: 55mW
Earphone output frequency: 5mw
Voice output frequency: 20Hz-20Khz
THD: Less 0.05%
Battery tape/capacity: Built-in lithium lion olmer/3.7v, 150mAh
Normally works voltage: 30-35mA
Signal-to-noise ratio: 87.2dB
Earphone impendence: 16ou*2
Weight: 52g
Dimension: 172*160*40mm