Richome Wireless Motion Sensing Light Bar with Magnetic Strip, White Led Light Strip Battery Operated Cabinet LED Light, Sensor LED light 80lm: the light will light up when you get within 3 meter of it and will go out 15 seconds after you walk out of its sensing range Smart sensor chip with passive infrared (PIR) technology, reliable performance and high sensitivity, accurately detect your movement. It will turn on only when it is dark and when motion is detected. Also you can choose to turn the light directly on or off for your diverse needs Simple Installation: An adhesive strip with magnetic fields is easily attached to and detachable from the lamp body. No tools, screws or nuts are required. energy-saving and environment friendly. Battery require 4*AAA (not include) Note: This light can only be turned on in darkness environment. It won't turn on if the light sensor has been detected by the enough light. And Please DO NOT install this light in high temperature place, otherwise, high temperatures will affect the adhesive strip, and then the light will slide easily!!