... be defined as function keys, being easily operated, replacing some mechanical keys on the control cabinet, with the number key function ... greaseproof Hardware specification Display screen4.3"STN- LCD Display screenResolution192 x 64 pixelsLCM lifeWith 25±2,65±10% RH over 50000 ... 1sVibration resistance10~25Hz(2G for 30 min, in any of X,Y,Z axis)Degree of protectionIP65the front panelSH-300 Text Panel ...