Keyboard of the KD-4 code of the hidden se

The keyboard of the hidden set of a code with the built-in controller of access is intended for control of electric locks, the security alarm system, elevators, lighting, ATMs, etc. on the code entered from the keyboard in places where restriction from foreign looks of ill-wishers and ensuring the multiuser access is required (for example, an access door).
The keyboard can be installed on a door, a wall and other objects, both indoors, and outside.

Possibilities of the keyboard allow:

- to gather and change a code so that even nearby the standing observer will not see the code gathered by you;
- to connect the keyboard to the alarm system;
- to keep codes in the absence of food not less than for 50 years;
- to operate remotely the keyboard (on two wires)

Technical characteristics: