1. Please make sure the battery anode and cathode have been installed correctly.2. Please do not install 2 lights too close together.The lighting may cause the other not to work.3. If you use alkaline battery first, then switch to zinc-manganese dry battery, the lights may not work because the zinc-manganese dry battery is shorter than the alkaline battery.4. The sensor light may not work if you use infrared heater in winter.Infrared will cause sensor failure.However, the light will return to work within 30 minutes after turning off the heater.Features:● Sensitivity: 3 meters distance.● Sensor range: 60 degrees.● Operating temperature: -20°C to 40°C.●LED quantity: 6 LEDs.● Light color: cool white.● LED lifespan: 50,000 hours or more.● Mounting: adhesive tape or magnet.● Product diameter: 8 cm.● Thickness: 2 cm.Contents: 3 LED night lights with motion sensor. 3 3M double-sided adhesive pads. 1 user manual (English language not guaranteed)Super Bright LED Light: Up to 25 lumens output with 6 super bright pieces, provide enough light to ensure you never stumble in the dark.PIR Motion Sensor Light: Automatically turns on within 3meters, turns off automatically after 15 seconds.Turns off during the day when bright enough.Save energy.Lightweight and Portable Design: Works great indoors and outdoors, stick anywhere as cabinet light, closet light.Easy Installation: Built-in magnet stick on iron parts, and 3M sticker (included) to stick anywhere, no tools, screws or nuts required.Battery Operated: Each part requires 3 x 1.5V AAA batteries (not included).To provide you with lighting in areas that have limited or no access to electricity. Description: With motion sensor lights, you can - Say goodbye to shocks in the dark. - Comfort children who are afraid ofdarkness.- Cheaper to use than ceiling lights.Motion sensor lights  act like little “guardians,” providing an automatic, hands-free way to protect your homes inside and out.Brighten up your bedroom, stairs, hallway, closet or entryway to your home where the switch is just too far from the door.Don't leave the lights on without having to run the electricity bill. Easy installation, mounts in seconds.No hammer, drill, or tools needed.Simply use the double-sided adhesive pads or stick to any metal surface with the built-in magnet.Note: Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.