... /SDRAM, support at least 500 transaction records.OSLinuxPower SupplyExternal switch powerInput: 100V~240V AC,50/60HzOutput: 8.5VDC, 2.5AWorking electric currentpower ... dustproof, 10 alphanumeric keys,9 function keys,1 on/off switch, supports to input figure and letter,the life cycle of ...