This solenoid valve is low temperature design, temperature below 30°, low heat and low noise. 100-240V wide voltage input, DC 12V output, the solenoid valve is 12V upgraded version without noise. It is safe, leak-free and easy to install, automatically turns on and off when used with a timer. The timer can also connect your aquarium lighting system, with it, keep your aquatic plants better healthy, more convenient and energy saving. Features: Quiet and safe: 100-240V wide voltage input, DC 12V output, the solenoid valve is an updated 12V noiseless version. High quality power cord (total length of power cord is 90cm), with ‘shockproof’ charger, safety and no safety hazard. Adjustable: turns on and off automatically when used with a timer. With this CO2 solenoid valve, the timer can connect your aquarium lighting system and cut off the CO2 supply depending on the light. keep your aquatic plants healthy, more convenient and save energy. Suitable for: one end connects M10*1 external