Button optional:

LED color: White LED, Blue LED,Red LED, other color LED;
Braille:   without braille 
Button Surface:  concave mirror surface,flat stainless steel surface
Connection: wire connection
Voltage: 24VDC, 12VDC, 6VDC
Normal Open, Normal Closed

Number & Figure in button surface: no.:1.2.3....64, figure:
Door Open, Door Close, Arrow Up, Arrow Down, Alarm Bell,
telephone, G, B, P, B1, B2, etc.;

Feature:

Button surface material: Outer frame material are ABS, button surface cover material is stainless steel ,mirror type button surface.
The thickness of installation plate: 2-7mm, Installed by plastic screw(supplied together with our button),very easy for installing.
Fire-proof components, in accordance with European standard EN-81
Life: > 5 million of operation life.

Reference supplied for OTIS elevator.

Figure dimension (mm):