Ajax HomeSiren Black Wireless Indoor Siren with LED Indicator

Ajax HomeSiren Black - Wireless Indoor Siren

The Ajax HomeSiren is a compact wireless siren built for indoor use within an Ajax security system. Beyond sounding a loud alert when a connected detector is triggered, it doubles as a security status indicator, giving occupants an audible and visual reminder of entry and exit delays, arm/disarm status, and post-alarm events. It communicates with an Ajax hub or range extender over the long-range Jeweller radio protocol, making it a practical addition to homes, offices, shops, and other protected premises.

Key Features

• Adjustable siren volume from roughly 81 to 105 dB at 1 metre, configurable in the Ajax app to suit the room
• Long-range Jeweller connectivity, communicating with an Ajax hub or ReX range extender over open-field distances of up to 2,000 metres
• Extended battery life of up to 5 years using two CR123A 3V batteries, with a low-battery indicator
• Built-in status LED plus a connector for an optional external LED, useful for visible arm/disarm confirmation
• Configurable alarm duration, adjustable from a few seconds up to several minutes depending on firmware
• Chime and entry-delay function that beeps when opening detectors trigger while the system is disarmed, handy for shops and offices
• Tamper protection that sends an instant notification if someone attempts to remove or open the device
• Quick SmartBracket mounting for fast, tidy installation with batteries pre-installed out of the box
• Compact black housing designed to blend discreetly into indoor spaces

Where It Fits in a Security Setup

HomeSiren Black is best suited to residential and light commercial interiors where an audible local alarm is needed alongside remote monitoring through the Ajax app. It's commonly paired with motion and door/window detectors to provide immediate on-site warning, act as an entry-delay reminder near a keypad, or serve as a chime for retail entrances. Because it only works within an existing Ajax ecosystem, it requires an Ajax hub and at least one detector already installed.

What's in the Box

• Ajax HomeSiren unit (Black) with batteries pre-installed
• SmartBracket mounting plate
• Mounting screws and fixings
• Connector for external LED
• Quick start guide

Frequently Asked Questions

Does the HomeSiren work without an Ajax hub?
No. It only communicates over the proprietary Jeweller protocol and must be paired to a compatible Ajax hub or range extender.

Can it be installed outdoors?
No. The HomeSiren is designed specifically for indoor use; for outdoor deterrence, Ajax offers the StreetSiren range.

How long does the battery last?
Under typical usage the two CR123A batteries are rated to last up to 5 years before replacement is needed.

Additional Resources

• More info