WIFI time attendance 1.MOQ is 10pcs 2.Backup battery is optical 3.Embedded alarm clock 4.Turn ... ).Accept ODM or OEM, providing system local voice, menu language, software analysis, casing-making. 4. Description User capacity3, 000Transaction Storage80, ... and humidity0 - 45, 20%-80%OptionsProximity or Mifare one card, backup battery,USB(As your request)ApplicationsOffice / building / factory / hotel / ...