Sensor Light, Battery-Powered: These indoor motion sensor lights are powered by 3 AAA batteries (not included). The smart sensor board uses passive infrared technology for reliable performance and high sensitivity to detect motion activation. Energy-Saving Sensor Lights: Thanks to the bulb-free LED technology, the battery night light has a power consumption of only 0.5W and consumes very little power. 3m motion detection and a 120° recognition angle automatically turn on the light with a lifespan of up to 50,000 hours, and the maximum power consumption at night is only 0.5W thanks to the auto on/off function. Easy Installation: Use the included double-sided tape. No screws, nuts, or tools are needed; you can attach it to any smooth surface. Provides a beautiful warm light to help you and your child fall asleep. Application Area: These stair sensor lights automatically turn on at dusk and night. It automatically turns off at dawn if the ambient light is insufficient; otherwise, the environment becomes brighter. Suitable for use in closets, stairs, kitchens, rooms, bathrooms, bedrooms, cabinets, hallway night lights, cupboards, bedside tables, etc.