MP4 watch 1.8" Inch Screen USB plunger USB2.0(High-Speed) Capacity 128MB ~ 8GB Power 7H(earphone):4H(video):6H(radio):3H(extra speaker) Sound recorder Rec. rate 8KHz~128KHz Rec. format MP3(32K bps/64K bps/128K bps) Rec. time 8H(128Flash) Radio Radio frequency 76MHz~90MHz(for Japan):88MHz~108MHz(other area) Radio time 6H MP3,WMA Earphone output 40mw?/16R/-75db MP3 32k bps~320k bps WMA 32k bps~380k bps Audio Frequency 20Hz~20KHz SNR ≧88dB Distorted degree Music Format Mp1,Mp2,Mp3,WMA,WAV Video Format NX-AVI Time Showing Picture and Number Language English, traditional Chinese, mordent Chinese, Korean, etc Operating system Windows 98/Me/2000/XP,Mac OS 9.x/Mac OS X,Linux 2.4 Upwards