Three modes: automatic (motion sensor activated), no light during the day when the light is sufficient; on (constant light, motion sensor off).The light will automatically turn on when it is within 6 feet of the sensor, and will automatically turn off after 15-20 seconds This motion sensor night light is very suitable for corridors and stair landings, or as a comfortable night light for anyone who is afraid of the dark. It is a perfect complement to any home Place the motion sensor night light in any room of the house, no need to worry about tripping over wires It has two sensors: a passive infrared (PIR) sensor to detect movement, and a light sensor to detect changes in light. Set it to "Auto" and the motion sensor night light will react to changes in the environment up to 6 feet away and provide a warm, soothing glow for about 20 seconds. Perfect if you are "caught" in the middle of the night In addition, the light has a constant "on" setting, so it can double as a night light for people who need a good night's sleep, and can also be used as an environmental reading light for night owls