Product 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 power Two 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 day Super 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. specification 1. Sensitivity: about 8 meters 2. Sensor range: about 120 degrees 3. Number of LEDs: 80 LEDs 4. Light color: warm yellow 5. Delay time: 20S 6. LED life: 50,000 hours sept. Product size: 19 x 19 x 6.5cm 8. Material: ABS 10. Battery Required: 4 D size batteries (not included) Installation Notes: 1. Rotate the back plate of the product clockwise 2. The retainer cap on the rear cover can be easily lifted, and the rear cover can be rotated clockwise to open 3. Use the included mounting hardware to mount the back plate to the wall, ceiling or anywhere you want 4. Insert the battery into the lamp's battery slot 5. 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 Contents 1 x Motion Sensor Ceiling Light 1 x Retaining Plug 1 Instruction Manual. 4 screw sockets