BZ-50 Power Pack provides 24 VDC operating voltage to Watt Stoppers low-voltage occupancy sensors. This device is constructed with environmentally friendly materials and is RoHS-compliant. The BZ-50 consists of a high-efficiency switching power supply and a high-current relay. It has an input of 120/230/277 VAC, 50/60Hz, and an output of 24VDC, 225mA.