Check the listing for details. WSD VA 347 WALL SWITCH SENSOR VACANCY ONLY ACUITY CONTROLS. Condition: New – Open box. Listed at 15.00 USD. Used locally in restaurant bathrooms to automatically turn on/off bathroom lights by sensing occupancy. These were found in a Charity re-sell outlet. Originally came with 5 year warranty but since I am not an authorised dealer there is no warranty. New, never used in box with instructions and wall plate cover. Rated at 347 volts so it can be used on 110 and 220 volt systems to control incandescent or fluorescent lighting or motors. On-line info follows- OVERVIEW The WSD is a stylish, easy to install, and simple to use Wall Switch Decorator style Passive Infrared (PIR) sensor. It is ideal for private offices, copy rooms, closets, or any small enclosed space without obstructions. A user programmable time delay ensures that once the room is vacated the sensor will time out and turn off the lights. Additionally, the WSD sensor has several On Modes and Switch Modes that can be programmed using the front push-button.Not recommended for rooms with obstructions. Additionally, all WSD Family sensors have a patent-pending wiring method that enables them to function either with or without a neutral connection. WSD units come pre-configured for wiring without a neutral; however, if connection to neutral is required by code, contractors can convert the unit in seconds. FEATURES• Compatible w/LEDs, electronic & magnetic ballasts, CFLs, & incandescents• 100% passive detection, no potential for interference with other building systems• Small motion detection to 20 ft• Push-button programmable without removing cover plate - adjustable time delays & operating modes• Dual technology (PDT) utilizes PIR/Microphonics detection (patented)• Self-grounding mounting strap• Device accommodates powering over ground or neutral connection (patent pending)• Ultra low current leakage (