Quiet and Safe: Wide voltage input 100-240V, output DC 12V, the solenoid valve is an updated 12V noiseless version. High quality power cord (total length of the power cord is 90cm), with "anti-shock" charger, safe and no safety hazard. Adjustable: Automatically turns on and off when used with a timer. With this CO2 solenoid valve, the timer can connect your aquarium lighting system and cut off the CO2 supply according to the light. keep your aquatic plants healthy, more convenient and save energy. Suitable for: One end connects M10*1 external thread or fine adjustment valve, the other end connects 4*6mm tube or bubble counter (single head solenoid valve). 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, practical, stable and easy to install. Guarantee: Any problem, please contact our store without hesitation. Honor to serve you!