The IrDA-USB converter Z501J from Gossen Metrawatt is an electrically isolated infrared-to-USB interface adapter that enables wireless data transfer from measuring instruments such as PROFiTEST C, METRISO C and GEOHM C to a PC. It is connected via USB, provides a virtual COM interface and contains drivers (CD) for older Windows versions - ideal for easy data readout and firmware updates of your test devices.