MAIN FEATURE · Dimensions: 392mm x 110mm (front panel) · Dustproof, Water proof, Vandalism resistance · Mounting type: Rear Mounting · No. of keys: 66 keys, high quality stainless steel. · Track ball diameter: 38mm · Keyswitch Technology: Silicone switching element · keyswitch lifetime: > 5 million of operations. · Actuation Force/travel: 1N/2.0mm · Mounting Rack: Aluminum alloy. · Lettering: laser engraved legends for excellent durability · G.W. 1.80kg. TECHNICAL DATA · Protection Level: IP65; NEMA4X · Lifespan: > 5 years. · Interface: PS2, USB available. · Supply Voltage: +5V DC +/-5% · Operating temperature:-10C to +60C. · Storage temperature: -20C to +70C. · RoHS, CE and FCC. All languages version and interface are available on request.