Features Sound control activated in dark environment: The module responds to sound in low light conditions, offering 24-hour sound control when the photoresistor is covered in black, promoting energy-efficient operation. Dual function with light control: Equipped with light control capabilities, the photoresistor enables sound control even in bright environments, providing enhanced versatility for various lighting conditions. Versatile application for small power appliances: Compatible with a range of small power devices, including solar lights, alarms, and small motors, offering flexible and practical usage options. Sensitive sound sensing: Activates at 20 decibels within 1 meter, providing reliable and precise sound control, ensuring efficient performance in response to sound stimuli. Convenient installation and portability: Each pack contains 5 lightweight modules, enabling easy installation and effortless portability, ideal for various application scenarios. Specification: Item Type: Sound Control Switch Module Product Material: Glass Fiber Model: S330 Input Voltage: DC 3V-30V (do not use dry batteries) Output Voltage: DC 3V-30V (how much voltage input is input, how much is the output voltage) Output Power: The output power of light (W) can not exceed the input voltage (V), and the current cannot exceed 1A. Activating Decibel: 20 Decibels (within 1 meter) Turn On/Off Delay Time: Fixed 45 seconds. (not adjustable) Package List: 5 x Sound Control Switch Module Package List 5 x Sound Control Switch Module