Features This self recovery button switch is ideal for 3 way/4 way cranes, roller gate control etc. Three buttons: you can press up and down according to the arrow to start, and press the red button to stop FOUR BUTTONS First press the green start switch, then press the up and down arrows to switch to work, and press the red button to stop. Waterproof protection grade IP32, excellent product performance, waterproof, dustproof and corrosion resistant. ABS shell, high hardness, protection function for switch, durable, strong practicality, perfect tool for winch roller door truck lifts. Specification: Item Type: Momentary Switch Station Box Material: ABS shell Application scenario: industrial control panel Operating current: 10 (8) A. Working voltage: AC 400 V ~ (i.e. below 400 V). Waterproof grade: IP32 Size: SGKJ-3N: approx. 13.5 x 6.6 x 6 cm / 5.31 x 2.60 x 2.36 inches SGKJ-4N: approx. 16.5 x 6.6 x 6 cm / 6.50 x 2.60 x 2.36 inches. Package List: 1 x Momentary Switch Station Box Package List 1 x Momentary Switch Station Box