SensorWorx SWX-851-IV Wall Switch And Load Controller For Wireless Sensors - 120-277V - Ivory FinishSensorWorx SWX 851 IV SWX 851 IV Product Description SensorWorx wireless wall switch load controller links to remote wireless occupancy sensors, photocells, and switches without low voltage wiring in order to provide automatic lighting control. Designed with contractors in mind, the unit is significantly shallower than typical wall controllers, resulting in less crowded wall boxes. Additionally, versatile wiring enables usage with or without a neutral