The fire protection of the Ajax system is provided by wireless fire detectors that give instant warning in the event of the detection of smoke, a rapid increase in temperature or a dangerous level of CO concentration. Part of the Ajax security system, fire detectors alert users and the central monitoring station through integrated and connected sirens, mobile applications, SMS or phone calls. Multiple detectors connected to the panel can trigger an interconnected alarm within 20 seconds if at least one of them is activated, eliminating the danger of not hearing an alarm. Thanks to their built-in 85 dB buzzer, Ajax fire detectors are always ready to signal danger, regardless of the state of the power supply or the connection to the control panel.

Ajax fire detectors are equipped with a powerful 85 dB siren. For each alarm or event, the detector emits impossible-to-ignore sounds with different patterns, making it easy to recognize the type of threat and react accordingly. All fire detectors can signal the fire simultaneously: it only takes about 20 seconds to trigger the interconnected alarm. As part of the Ajax system, critical alarms and alerts are also sent from the Ajax mobile and desktop applications, which notify users and central monitoring stations of danger.

The Ajax system uses secure two-way radio communications based on the proprietary Jeweler protocol. It supports block encryption and device authentication for each session with the panel to prevent sabotage, spoofing or data theft. The automatic power consumption control makes it energy efficient, since it does not always use the maximum power of the radio transmitters of the system devices. The device is also more stable because it uses radio frequencies with less interference. Ajax power stations use frequency hopping to protect against radio interference and signal interception. The system automatically changes frequency within a band and notifies the security company and users of the jamming.