Features:1. Photoresistor: the sound control in bright environments is incorrect. It can be controlled in dark environment. The photoresistor can be controlled 24 hours a day and overnight as wrapped in black thing.2. Voltage & Current: can control DC3-30V voltage (recommended control between 3.7-24V, can not drive high voltage 220V). The output voltage is the same as the input voltage. The current rating is 1A.3. Easy to switch: the decibel for switching on the light is 20 decibels (at a distance of 1 meter). You don't have to scream loudly and it won't be triggered by a small sound.4. Delay Close Time: The light will turn off after 45 seconds, saving the problem of frequent sounds, it is simple and convenient.5. Wide Application: As long as it is within the required range, you can choose any product you want to operate, such as solar lamp, small motor, alarm and so on. Description:The circuit board provides sound control to light in dark environment, with decibel to turn on the light 20 decibels, suitable for solar lamp, small motor, alarm and so on. Specifications:Material: Fiberglass Size: 26*16.2mm Input Voltage: DC 3V-30V Output Voltage: DC3V-30V (Input = Output) Output Lamp W Number: X4 Supply Voltage is Maximum Endurance In Number. (For example, 12V power supply can not exceed 48W lamp) current cannot exceed 4AValue decibel: 20 decibels (distance within 1 meter)Turn on delay and turn off time: fixed 45 seconds. (time is not adjustable)Package Included:1pc*PCB Notes:1. Please allow 0-1 inch error due to manual measurement. Thank you for your understanding.2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object.