About this item Energy-saving switch with high-sensitivity detector that uses microwave radar as the control signal source to detect human movement. When someone enters the detection area, the light will turn on immediately. The radar signal can penetrate plastic, glass, ceiling, wooden door and thin walls. It supports adjusting the sensor distance and time delay, convenient to use. Easy to install, suitable for LED lamps, incandescent bulbs, energy-saving lamps. Ideal for closet, basement, laundry room, garage, bathroom, driveway and stairs. Recommended wall installation height: 1.5-1.8m, recommended ceiling installation height: 3-6m. 💡Note: Due to manual measurement, the size may have an error of 2cm/1inch; due to different monitors and angles, the color and size may be slightly different, thank you for your understanding! HANBING welcomes your purchase! We look forward to showing you your shopping experience.