Quiet and Safe: Wide voltage input 100-240V, DC 12V output, the solenoid valve is an upgraded 12V noiseless version. High quality power cord (the total length of the power cord is 90cm), with "anti-shock" charger, safety and no safety risk. Adjustable: Automatic on/off when used with a timer This CO2 solenoid valve, the timer can connect your aquarium lighting system and cut off the CO2 supply according to the light level. Keep your aquatic plants healthy, more convenient and save energy. Suitable for: One end connects M10*1 male thread or fine adjustment valve, the other end connects 4 pipes*6mm or bubble counter (single head solenoid valve). Durable and Easy to Control: 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. Guarantee: If you have any problems, please contact our store without hesitation. Honor to serve you!