1. It is suitable suitable for all kinds of gas alarms. It is suitable suitable for 4, 6 and 1 inch different models of old and new, pipeline gas ball valves and butterfly valves. It is easy to install and does not need to change the design of gas pipeline. Users can install it by themselves. 2. with automatic, manual conversion clutch. 3. rated voltage: DC12V 4. working voltage: DC8V-DC16V 5. working current: 20mA-350mA-1000mA Name:valve switch Dimensions:100mmx90mmx70mm Working power: 0.24W-4.5W-10W torque: 10-30-40kg.cm automatic valve closing time: 3-8 seconds electric valve opening time: 3-8 seconds insulation resistance: 20M withstand voltage: DC600V Colour:Black Material:Metal Package Contents: 1 * valve switch Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.