Built-in PIR infrared motion sensor, when detecting motion within 8 meters in dark environment, the LED ceiling light will turn on immediately. After 20 seconds, when no motion is detected, it will automatically turn off, saving battery powerTwo Modes There is a switch near the motion sensor, make slide the switch to turn on/off the photoelectric sensor. When open, it is not luminous during the day and it is luminous at night; when closed, it is bright all day.Battery Powered Motion SensorPowered by 4 D alkaline batteries (batteries not included), it can illuminate an area of 30 square meters. The battery provides up to 12 months of lighting with an average of 6-8 uses per daySuper Bright LED LightBuilt-in 80 pieces of bright and long-lasting SMD2835LED. It can spread in all directions and has up to 300 lumens of brightness to ensure you don't trip in the dark and protect your loved ones and children from the horrors of darkness around the home.Easy Installation & Wide Range of ApplicationsNo wires required, quick and easy installation in 5 minutes. Perfect for your bedroom, bathroom, stairway, hallway, workshop, basement, driveway, roof, door.It can prevent lights from going on unnecessarily and increasing your bill electricity.specification1. Sensitivity: about 8 meters2. Sensor range: about 120 degrees3. Number of LEDs: 80 LEDs4. Light color: warm yellow5. Delay time: 20S6. LED life: 50,000 hourssept. Product size: 19 x 19 x 6.5cm8. Material: ABS10. Battery Required: 4 D size batteries (not included)Installation Notes:1. Rotate the back plate of the product clockwise2. The retainer cap on the rear cover can be easily lifted, and the rear cover can be rotated clockwise to open3. Use the included mounting hardware to mount the back plate to the wall, ceiling or anywhere you want4. Insert the battery into the lamp's battery slot5. Cover the back cover, turn the lamp body clockwise, press the fixing cap, and turn the lamp body clockwise to fix the back cover tightly< /p>Package Contents1 x Motion Sensor Ceiling Light1 x Retaining Plug1 Instruction Manual.4 screw sockets