Readers are widely used among access control systems. On the basis of them, a large number of working time control systems has been implemented. The logic of employees’ behavior is the daily registration in the system by sending a touch memory key to the contact pad. As a confirmation of registration, LED indication is used. In addition, the readers are used in security systems as devices for arming and disarming the system. Most modern security systems support the 1-Wire protocol, which allows you to connect the reader to the central unit and use it instead of a keyboard or key fob. Readers are several times cheaper than keyboards or key fobs. At the same time, the reliability of these devices is not lower, and sometimes even higher than that of the above. In addition, unlike keyboards and key fobs, you can always know who and at what time the system was disarmed. The code put on the case I Button is fixed in the database. Readers are a reliable and simple access control device, giving preference to it, you will not regret.