WaterproofMP3playerSpecifications UFD(USBFlashDrive) Memorysize:128/256/512/1024MBComplianttoUSB2.0specification(fullspeed)Massstoragecompliant(NodriverneededforWin2000/WinME/WinXPandMacOS8.6 oraboveandLinux2.4.0)Non-volatilesolid-statestorage-dataretentionforatleast10yearsEndurance:100KProgram/ErasecyclesNoexternalpowerisrequired,powerbyUSBbusHotPlug playAudioplayer Audioformat:MP3,WMASupportedbitrate:Constantorvariablebitratefrom8Kto320K,samplingfrequency 8K-44.1KEqualizer:Normal,Jazz,Pop,Classic,RockStereooutputpower:10mWFrequencyresponse:20Hz20KHzSNR:90dbTHD: 0.1%GeneralFeatures Total8hoursplaytimewhileplay128kbpsMP3musicfileandpowerbybuildLi-Polymer battery.FirmwareupgradeablethroughUSBAmbientTemperature: Operating:+10~+50C Non-operating:-20~+60CHumidity: Operating:20%~80%RH Non-operating:20%~80%RHDimensions:60*20*20mm