Compatible Z-Wave controller/hub required Neutral is required for installation Compatible with Z-Wave Plus accessory dimmer (RF9642-Z) for wireless 3-way control, eliminating the need for traditional 3-way wiring or dedicated traveler wire Can be associated with up to 5 other Z-Wave Plus devices Dimmable seven step blue LED display alongside push pad indicates selected light level - even in full daylight (coordinates light level status with associated dimmer accessory) Pressing and holding push pad for 2 seconds brings light to full brightness without affecting preset levels RF9640-NDW-BX