... Guardmode:Waterproof Model Number:COB 63A Waterproof Hoist Pushbutton Switch,COB 63A 1,UsageIt is suitable to be ... snow, and dusty environment infringement,such as the remote control of the electric hoist crane, the equipment ... means with total power switch, "no letters" said without total power switch:"B" means total stop and switch. "K" means ... cover in the end. Waterproof Hoist Pushbutton Switch