The Ajax HomeSiren is a wireless indoor siren designed to provide an immediate audible alert within your security system. It connects via the proprietary Jeweller protocol, allowing for a radio communication range of up to 2,000 meters in open spaces and a rapid alarm delivery time of just 0.15 seconds. You can adjust the sound volume between 81 and 105 dB at a distance of 1 meter to suit your specific environment, while the piezo buzzer operates at a frequency of 3.5 ± 0.5 kHz. This compact device measures 75 × 76 × 27 mm and weighs only 97 g, featuring a discreet black finish and an IP50 protection grade. It is powered by two CR123A batteries that can last up to 5 years, ensuring long-term operation without frequent maintenance. For added security, the siren includes anti-sabotage features, block encryption with a dynamic key, and frequency hopping to prevent interference. To help you manage your system at a glance, the device indicates whether the system is armed, disarmed, or in an armed state. The package comes ready for installation with a mounting panel, an installation kit, and a connector for an external LED indicator, making it a practical choice for anyone looking to add a reliable internal warning signal to their home protection setup.