Protection Level: IP65; NEMA4X_x000D_ Lifespan: > 5 years._x000D_ Interface: PS2, USB available._x000D_ Supply Voltage: +5V DC +/-5%_x000D_ Operating temperature: -10Cto +60C._x000D_ Storage temperature: -20Cto +70C._x000D_ Dimensions: 110mm x 83mm_x000D_ Dustproof, Waterproof, Vandalism resistance_x000D_ Mounting type: Rear Mounting_x000D_ Key switch Technology: Silicone switching element_x000D_ Key switch lifetime: > 5 million of operations._x000D_ Actuation Force/travel: 1N_x000D_ Mounting Rack: Aluminium alloy_x000D_ Lettering: laser engraved legends for excellent durability