Dimensions Diameter32MMx133.5mmWeight 170gDisplay NoscreenConnectedcomputer USB2.0(FS)(Read1000KByte,Write1000-900KByte)Memory Machineflashmemory:256M-8GB16GBcanbeinsertedthefollowingexternalTFcardPowersupply 1200MAHrechargeablelithium-ionbattery(canbeexternal5Vpowersupply)formorethan12,000hoursstandby Playtimeupto6hoursspeaker/headphonesongs60hourscontinuousplayback MP3,WMA,WMV,ASF Headsetmaximumoutput (L)10mW+(R)10mW(32Ohm)MusicFormat Frequencyresponse 20Hzto20KHz SNR 85DbDistortionSNR 45dBMP1,MP2,MP3,WMA,WMV,ASF,WAVTemperature -5To40degreesCelsiusFlashlight 3WLEDcanbeusedcontinuouslyformorethan20,000hoursoflife.Adjustablebrightnessandmorefiles.Machineflashlightbatteryforupto4hourscontinuouslight.Speakeroutputpower Continuousoutputpowertomorethan2WvoiceAlarmwhistlefunction Accordingtotheguestslove,guestspersonalizetheirownmusicwhistleSupportedoperatingsystems Windows98/SE/ME/2K/XP,MacOS10,Linux2.4.2