Ajax ReX Range Extender Front View CP440B
Ajax ReX Range Extender Front View CP440B
Ajax ReX Range Extender 3-Way View CP440B
Ajax ReX Range Extender Indoor Application View CP440B
Ajax ReX Range Extender Setup View CP440B
App Controller CP440B

Ajax ReX Range Extender Black

R 3,014.00 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

Ajax ReX Range Extender Black is a range extender of communication signals that expands the radio communication range of Ajax devices fitted with a hub up to 2 times. The Ajax ReX Range Extender acts as a reliable link between the hub and Ajax devices that turns into the second decision-making center.

If the connection with the hub is interrupted for some reason, ReX will assume control: it will receive an alarm signal from the detector and activate the siren to attract attention to the incident and scare off the burglar.

It has a built-in tamper resistance and is equipped with a battery that provides up to 35 hours of operation without external power.

Product Code: 8075.37.BL1

Please note: ReX operates within the Ajax system, connected to the hub via the protected Jeweller protocol. ReX cannot pair to/extend from another ReX, it can only be paired to an Ajax Hub. 

The extender is compatible only with the Ajax hubs. Connection to uartBridge and ocBridge Plus is not provided. ReX does not increase the number of devices connected to the hub!


Reliable link for secure communication

ReX can manage some or all the devices in the system without affecting the alarm delivery speed.


  • Boosts the range of Ajax security system devices
  • Transmits alarms in 0.3 seconds
  • Communicates at a distance of up to 1800 m
  • Operates up to 35 hours on the back-up battery
  • Developed only for indoor use
  • Up to 5 range extenders can operate in the security system
  • ReX doubles the signal range which potentially extends the Ajax radio coverage area up to 35 km².
  • Secures large premises
  • ReX is protected against software and hardware attacks.
  • Notifies of jamming and tampering with the device body
  • Device is configured via the mobile application for iOS and Android smartphones
  • Push-notifications, SMS messages and calls (if enabled) notify ReX user about all events
  • Quick and Easy setup
  • The Ajax system can be used for independent monitoring of the site and can be connected to the Central Monitoring Station of the security company.



In order to connect ReX to the system, scan the QR code, name the device, and turn it on. Select the Ajax devices that will operate via the range extender.

Proceed by installing ReX in a safe spot. No disassembling required. Just use the SmartBracket mount.


Compatibility All Ajax Hubs (*Does NOT support MotionCam)
Classification Radio channel range extender
Device type Wireless
Installation method Indoors
Alarm signal delivery time 0.3 seconds
Maximum connected devices Hub, Hub 2, Hub Hybrid — up to 99
Hub Plus — up to 149
Hub 2 Plus – up to 199
Max number of connected ReX per hub Hub – 1
Hub Plus, Hub 2, Hub 2 Plus, Hub Hybrid — 5
*ReX can only be directly connected to the hub. ReX cannot be connected to another ReX
Operating system OS Malevich
Power supply 110-240 V from mains or 12 V when using 12V PSU for Hub/Hub Plus/ReX
Battery backup Li-Ion 2 А⋅h (Up to 35 hours of offline operation)
Communication range with detectors Up to 1,800 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 25 mW
Block encryption based on AES algorithm Yes
Detector polling period 12−300 s
Frequency hopping Yes
Operating temperature range From −10°С to +40°С
Permissible humidity Up to 75%
Protection against fraud Yes
Jamming detection Yes
Tamper-resistant Yes
Product Dimensions 163 mm х 163 mm х 36 mm
Product Weight 330g
Packaging Dimensions 239 mm x 189 mm x 53 mm
Mass of unit packed 800g
Warranty 24 months limited Manufacturer’s warranty. The warranty does not cover batteries.



1 x Ajax ReX Range Extender Black

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