Binay Opto Electronics Private Ltd. Manufactures Illuminated and Non-Illuminated Pushbutton Actuator. Binay Opto Electronics Private Ltd. Binay Opto Electronics Private Ltd. Also offers LED based pilot lights, aviation obstruction lights, alarm lights, etc. Illuminated and Non-Illuminated Pushbutton Actuator are available in `S` Type illuminated version. The switching elements [1NC or 1NO, or 1NC + 1NO] are clipped on to appropriate slots on the unit housing on either side of the LED Module holder which is itself clipped on to the centre slot of the housing. They are also available in bi-colour versions with a flying lead for the common input.