steute Wireless' industrial controls offer a comprehensive line of wireless, batteryless pushbutton switches. These wireless pushbutton switches feature an internal electrodynamic energy generator. No battery is required. Actuation of the pushbutton sends a unique, wireless telegram to one or more compatible, easily-programmed receivers. The receiver sends confirmation of the received telegram. If the pushbutton actuator does not receive the confirmation signal within 15 ms, it transmits a second telegram. The receiver accepts up to 10 discrete telegrams per channel.