... , GPRS or CDMA ,LANSupport optional components, such as barcode scanner, fingerprint reader, pinpad, contactless card etc.More security design ... be extended to 64MB,128MB FLASH/SDRAM, support at least 500 transaction records.OSLinuxPower SupplyExternal switch powerInput: ... code.UpdateRS232 from PCAdditional (optional)Finger printer ,Laser scanner,pinpadsize210(L) X 102(W)X79(H)mmCertificationsChina ...