... support at least 500 transaction records.OSLinuxPower SupplyExternal switch powerInput: 100V~240V AC,50/60HzOutput: 8.5VDC, 2.5AWorking electric ... currentpower on current:50mA~150mA,printing average current:1AConnectivity1 power ... and dustproof, 10 alphanumeric keys,9 function keys,1 on/off switch, supports to input figure and letter,the life ...