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Elevator Button Feature Stianless steel decoration frame, ground stainless steel key-press the thickness of installation plate:2-3mm Easy to fix with embeding the facepalate directly Character LED illumination with braille design, optional charater without braille design. Specification The buttons include landing button, up and down button,door open and down button alarm and intercom button etc. The red illumination color of button can instead with various LEDs Electrical PropertiesIndication lightRated Voltage(optional)DC12V,DC24VRated Current13mA+-3mAswitchRated VoltageDC30VRated Current50mAContact Resistanceless than100mΩInsulation Resistancemore than 100mΩMechanical PropertiesOperation Distance0.3-0.7mmMaximum Distance1.2mmOperation Pressure3-6NLife-Spanmore than1 millions of operarationOperating EnvironmentOperating Temperature-10 to 50 centigrade(no iceing)Operating Humidity45%-90%