Quiet and safe: 100-240V wide voltage input, DC 12V output, the solenoid valve is an updated 12V noiseless version. High quality power cord (the total length of the power cord is 90cm), with "anti-shock" charger, safety and no safety hazard. Adjustable: turn 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: Two ends connect 4*6mm tube or bubble counter (double head solenoid valve). anti-loss and good sealing. No leakage. Durable and easy to control: Be made of aluminum alloy, strong and sturdy. Low temperature design, temperature below 30, low heat and low noise. According to the user's need to control the output time, convenient, stable and easy to install.