The sound and light controlled delay switch is mainly composed of a sound control switch, a light control switch, and a delay circuit. It is mainly installed in public areas such as hallways, corridors, garages, and restrooms, where it automatically senses environmental light and. [ APPLICATIONS] This sound light control switch operates within a DC voltage range of 3V to 30V, for applications like solar lights and motors, providing flexibility in diverse projects. [OUTPUT VOLTAGE MIRRORING] Ensures that the output voltage matches the input voltage, safeguarding your devices. SCL-8 is a sound light controller. 8pcs LED will turn ON if there is sound near the microphone. This function can work normally without affected by light. The light control circuit is controlled by a photoresistor.