The Ajax StreetSiren is a wireless outdoor notification device designed to alert you and your neighbors to a security breach through both loud sound and bright LED light. Using the Jeweller protocol, it maintains a stable connection with your hub over distances up to 1300 meters in open areas, ensuring reliable communication across your property. You can customize the alarm volume between 85 and 113 dB and set the sound duration from 3 to 180 seconds directly through the app. The device is powered by four CR123A batteries that can last up to 5 years, though it also supports an optional 12 V DC external power supply for added flexibility. Its IP54 protection rating and an operating temperature range from -25°C to +50°C make it durable enough for year-round outdoor installation. Measuring 200 × 200 × 51 mm and weighing 528 g, the siren includes built-in tamper protection via a button and accelerometer to prevent unauthorized removal. Recent firmware updates have added helpful visual cues for arming modes and entry/exit delays, as well as chime functions. It works seamlessly with all Ajax hubs and signal extenders, coming complete with a mounting panel and installation kit.