Ajax HomeSiren White Front View SD420W
Ajax HomeSiren White Front View SD420W
Ajax HomeSiren White 3-Way View SD420W
Ajax HomeSiren White Side Angle View SD420W
Indoor Application View

Ajax HomeSiren White

R 1,563.00 Incl. VAT
R 0.00 Incl. VAT

Available to order online or collect at 6 Cosmic Street Linbro Park, Sandton, 2090 (Map)


Spec Data Sheet Button

The Ajax HomeSiren White is a wireless indoor siren that notifies of a detector activation with an audible alarm to scare off the intruders or draw attention to interference. The HomeSiren has three sound levels from 80 to 98 dB and a customizable audio time that can be set in the mobile application.

The HomeSiren siren operates only with the Ajax system, connected to the hub via the protected Jeweller protocol.

Compatible with all Ajax hubs and range extenders. Connection to ocBridge Plus and uartBridge integration modules is not provided.

Product Code: 8697.11.WH1


  • Wireless Indoor Siren
  • Built-in battery (lasts up to 5 years)
  • Communication range of 2000m (in an open space)
  • Internal siren volume — three levels from 80 to 98 dB.
  • Siren alarm time — from 3 seconds to 3 minutes.
  • Indicates armed/disarmed state by means of a built-in LED
  • Recommended installation height — 2.5 meters and more
  • An external LED is connected to the siren, if necessary
  • Up to 10 sirens may be connected to the Ajax hub.
  • Tamper resistant
  • Set up via the Ajax app for iOS, Android, macOS and Windows
  • System notifications delivered via push notifications, SMS and calls (if activated)
  • Quick and Easy installation



The Ajax HomeSiren comes ready to operate straight out the box.

The battery is pre-installed, so there is no need to disassemble the detector.

With one click, it can be connected to the hub in the mobile application. It can be mounted on the SmartBracket in just a few minutes.


Compatibility Operates with all Hubs and ReX range extenders
Classification Radio channel security sounder
Type of siren Wireless
Type of notification Sound
Installation method Indoors
Connector for external LED Available
Sound volume level Adjustable, 81−105 dB at a distance of 1 m
Alarm length Adjustable, 3−180 s
Indication of armed/disarmed status Yes
Alarm signal delivery time 0.15 s
Power supply 2 x CR123A batteries, 3V
Battery life Up to 5 years
Communication range with central unit Up to 2,000 m in an open space
Two-way communication between devices Yes
Operating frequencies 868.0−868.6 MHz
Self-adjusting RF output power Up to 20 mW
Block encryption based on AES algorithm Yes
Device polling period 12−300 s
Temperature sensor Available
Operating temperature range -10°С to +40°С
Permissible humidity Up to 75%
Protection class of body IP50
Protection against fraud Yes
Jamming detection Yes
Tamper-resistant Yes
Remote setting and testing Yes
Certification Grade 2, CE
Product Dimensions 75 mm х 76 mm х 27 mm
Product Weight 97g
Packaging Dimensions 108 mm x 107 mm x 31 mm
Mass of unit packed 225g
Warranty 24 months limited Manufacturer’s warranty. The warranty does not cover batteries.



1 x Ajax HomeSiren White 

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