MKA-50N 50 Keys Vandal-Proof Waterproof Industrial Metal Keyboard

Number of keys 50 Key Switch Metal dome switch technology Switching cycles more than 5 million actuation Material FRONT PANEL: 304 stainless steel  BACK PANEL: aluminum Power Supply 5v DC /-5% Interface PS2/USB EMC Standard EN 55032:2015 , EN 55035:2017 Temperature Range Operating: -20°C to 55°C, Storage: -30°C to 60°C Compatibility All Windows, Linux, Mac Warranty 1 year Certification CE/FCC/ RoHS/IP65/IK09 Dimensions 271.0 x 118.5 mm (Front panel) Weight 1.3kg