... card to expand memoryMobile Internet: WAPMessaging: SMS / MMSMultimedia: FM Radio, Camera, Image viewer, Video player, Audio player, ... To do list, Alarm, Calculator, Unit converter, Currency converter, World clock, E-book readerFun & Games: MahjongLanguages: English, Chinese, ... voltage: 3.7 VdcTest temperature ambient temperature: 25oC ± 5oCStandard audio signal: 1KHz PX-D03 Dual Band Cell Phone Radio