Features: br new high quality High sensitivity, stable performance durability . Used in corridors, bathrooms, warehouses, stairs, etc . The sensor is in a dormant state under light conditions, such as during the day . If the sensor has a sound, the control light will be on for about 45s . It can be controlled by any sound, it can work in a dark environment, such as at night . Specifications: Material: ABS Style: with Light / Without Light Size: Approx . 86x86mm/3 .38x3 .38inch Delay Closing Time: 45s Working Voltage: 220v Induction Principle: Sound Light Control Note: 1 .Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order . 2 .Due to the difference between different monitors, the picture may not reflect the actual color of the item . Package includes: 1x Switch with Light / Switch Without Light