This sensor is dormant in a lighting environment, for example during the day. It can be controlled by any sound and will work in dark environments, for example, at night. If the sensor senses sound, the controlled light will light up about 45s. Good build quality and stable performance. Automatic control, save energy. High sensitivity, practicality. Durable to use. Used in hallway, bathroom, warehouse, stairs, etc. Specification: Product Name: Sound Sensor Switch Light Sensitivity: Dark Product Model:MR-SK50A Load power: 40 W Input voltage: AC180-265V 50/60Hz Induction sound:50-70 decibels (6 meters radius) Induction delay: 40 seconds 10 seconds Photosensitive Seing: 10Lux Waterproof:IP22 Operating temperature: -20 45 C Product size: length 38 mm width 28 mm height 16 mm Package quantity:1000 / box Lamp application: downlights LED,ceiling lamps, lighting panels, light bulbs and other lighting fixtures or appliances. Specifications: Product Name: Sound Sensor Switch Light Sensitivity: Dark Product Model:MR-SK50A Load power: 40 W Input voltage: AC180-265V 50/60Hz Induction sound:50-70 decibels (6 meters radius) Inductive delay: 40 seconds 10 seconds Photosensitive Seing:10Lux Waterproof Class: IP22 Operating Temperature: -2045C Product Size: Length 38mm Width 28mm Height 16mm Package Quantity:1000/box Application lamps: downlight LED,ceiling lamps, panelowe lighting,filament lamps and other lighting fixtures or appliances. Package Includes: 1 * Sound Sensor Switch