B1900C109FlashMP3PlayerFeatures:CompatiblewithsMP3(Specialformat)USBFlashdiskfunctions,WindowsME/2000/XP/Vistanoneedtoinstalldriver5EQ USB1.1/USB2.0Interface,supportplugandplayRepeatone,RepeatAll,Intro,A-BrepeatTechnicalSpecifications:-Dimension:47*16*11mm-Weight:g(withoutbattery)-OS:Windows98SE,Windows2000,WindowsME,WindowsXP,WindowsVista-PCInterface:USB1.1/USB2.0-FileFormat:sMP3(Specialformat)-Bitrate:32Kbps~320Kbps-NoiseRatio:90db-Earphoneoutput:11mW+11mW@16Ohm-Rangeofoutputfrequency:20Hz-20KHz