SensorWorx SWX-900-AX-D2 Power Pack - Single Relay + 150 mA Supply - Auxiliary Switch Input - 0-10V Dimming - 120-277VSensorWorx SWX 900 AX D2 SWX 900 AX D2 Product Description SensorWorx power pack controllers transform incoming line voltage power to Class 2 low voltage as needed by sensors or other control devices. Additionally, they switch on off power to the connected lighting load as directed by the sensors and controls. SensorWorx power packs utilize a powerful microprocessor to optimize its switching timing in order to ensure long relay life even when