feature: The sensor is dormant in a lighting environment, such as during the day. It can be controlled by any sound, it will work in a dark environment, such as at night. If the sensor senses the sound, the controlled light will illuminate for approximately 45 seconds. Fine workmanship and stable performance. Automatic control saves energy. High sensitivity and practicality. Durable and easy to use. Used in corridors, bathrooms, warehouses, stairs, etc.