Work Principle:Sound Sensor / Voice Induction Lamp: Lamp will light up continuously around 1 minute after connect with power, then turn-off automatically, please wait around 15 seconds for sensing mode starts. Feature:Auto PIR motion detection Or Sound Sensor for light on/offDurable and energy-savingHigh sensitivity, high light and low consumptionSuitable for corridor, pathway, stair, garden, yard, etcSpecification:Light Color: WhiteConnector type: E27Detection range: 5MDetection angle: About 120Power: 3W/5W/7W/9W/12W (Sound Sensor)Voltage: AC200V-240VOperation instruction:1.Bulb can be installed near stair, better to let bulb head turn to exit/entrance2.The bulb should be keep far away from heater, air condition, fridge, stove, such places which temperature is high and sensitive(over absolute zero degree object will probably make bulb light up)3.Do not put any shield, furniture, or big object around the bulb4.Do not turn it to the window for avoiding hot air /white light perturbance, and body motion to wrongly light up the bulb5.Do not install bulb near gate or airwayTrouble Removal:1.When install it, it will auto light up and off, occasionally it can auto light up, the reason may be there's animal moving or bulb turns tohot place, or install angle is not correct2.If it auto light up every 8s and light off every 30s and it repeats that, now you should check whether there's person or animal moving around it, or can take the bulb to another room for checking.