Thank you for viewing. This is a Panasonic WRT 3617K, a 2-wire remote control dimming illuminance sensor with TU. It's a sensor used in conjunction with lighting to adjust the illuminance according to the brightness of the outside light. An installation manual is included, but please check the manufacturer's website for details. The outer box has faded as it was stored in the back of the warehouse, but I think the contents are clean. It will be handed over as is, so please consider it after referring to the photos. - Brand: Panasonic - Model: WRT 3617K - Voltage: AC100-240V - Rated Current: 5A