... Executive Guardmode:Waterproof Model Number:COB 63A Waterproof Hoist Pushbutton Switch,COB 63A 1,UsageIt is suitable to be used in ... A" means with total power switch, "no letters" said without total power switch:"B" means total stop and switch. "K" means with ... dustproof, and the rain performance 6, InstructionsA,Dismantling the cover, load seal sheath,then screw fastening them in the ButtonB, Tear ...