The Ajax DoubleButton is a compact wireless emergency button designed to send an immediate alarm signal to your security system. To prevent accidental triggers, it requires you to press both buttons simultaneously, a safety feature reinforced by a physical plastic barrier between them. Using the Jeweller two-way radio protocol, the device communicates with a hub at distances up to 1300 meters, ensuring an alarm is transmitted in no more than 0.15 seconds. An integrated LED provides visual confirmation that your signal has been successfully delivered. Measuring 47 x 35 x 16 mm and weighing only 17 g, this white device is highly portable and can be carried on a keychain, a string, or mounted using a dedicated holder. Its IP55 protection rating means it is shielded from dust and water splashes, making it reliable in various environments within a temperature range of -10°C to +40°C. The unit is powered by a single CR2032 battery that lasts up to 5 years, reducing the need for frequent maintenance. Beyond emergency alerts, you can use this button to trigger automation scenarios, such as activating sirens or controlling locks and blinds. It is compatible with all Ajax hubs and range extenders running OS Malevich 2.10 or higher, making it a versatile tool for anyone needing a discreet way to call for help or manage smart home functions.