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Ajax ReX Radio Signal Range Extender

Ajax ReX Radio Signal Range Extender

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Ajax logo Ajax
  • Distance up to 1800m
  • 35h Back-up Battery
  • Up to 5 per System
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The Ajax ReX is a range extender of communication signals that expands the radio communication range of Ajax devices fitted with a hub up to 2-fold. (Read more)


There are 2 variants of this product


The Ajax ReX is a range extender of communication signals that expands the radio communication range of Ajax devices fitted with a hub up to 2-fold. Developed only for indoor use. It has a built-in tamper resistance and is equipped with a battery that provides up to 35 hours of operation without external power.

The Rex enables users to place Ajax devices at a considerable distance from the hub for protecting multi-story offices, detached buildings, and even production plants. Connecting 5 ReXs to the security system extends its coverage to up to 35 km². 

ReX integrates the devices into an autonomous group within the system. The extender takes full control of the situation if the connection with the hub is interrupted for some reason. If one of its detectors sends an alarm signal, ReX may activate the siren to attract attention to the incident and scare off the burglar.

Screenshot 2022-07-18 090930.png

The Ajax Hub can connect to 1 Rex device, whereas the Hub Plus, Hub 2 and Hub 2 Plus can connect up to 5 Rex devices, yet the number of connected devices does not affect the alarm delivery speed.

ReX runs on OS Malevich and is as capable as the hub. The intelligent extender manages its connected devices and makes critical decisions in a blink of an eye. The capabilities and the role of ReX in the security system continue to evolve with the free OS Malevich updates available for all the users.


  • Wireless signal extender for the Ajax Jeweller alarm system
  • Communicates at a distance of up to 1800 m
  • Transmits alarms in 0.3 seconds
  • Grade II
  • Operates up to 35 hours on the back-up battery
  • Up to 5 range extenders can operate in the security system
  • Reliable link for secure communication
  • Always in sync with the hub
  • Immediate reaction to threats
  • New features with every system update
  • Functions up to 35 hours after power outage
  • All data is encrypted using a block cipher with a dynamic key
  • Notifies of jamming and tampering with the device body
  • QR code for simple connection
  • SmartBracket mount for quick set up
  • Mobile application for configuring and testing
Radio channel range extender
Device type
Installation method
All Ajax hubs
* Doesn’t support MotionCam
Alarm signal delivery time
0.3 seconds
Maximum connected devices (in a system with one range extender)
Hub, Hub 2 — 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 — 5

*ReX can only be directly connected to the hub. ReX cannot be connected to another ReX
Operating system
OS Malevich
Power supply
OS Malevich
Power supply
Communication range with detectors — up to 1,800 m in an open space
Two-way communication between devices

Radio frequency bands:
866.0 – 866.5 MHz
868.0 – 868.6 MHz
868.7 – 869.2 MHz
905.0 – 926.5 MHz
915.85 – 926.5 MHz
921.0 – 922.0 MHz
(Depends on the region of sale)

Self-adjusting RF output power — up to 20 mW
Block encryption based on AES algorithm
Detector polling period — 12−300 s
Frequency hopping
Operating temperature range
From −10°С to +40°С
Permissible humidity
Up to 75%
Protection against fraud
Jamming detection
163 × 163 × 36 mm
330 g
Within 24 months from the date of sale
Service life
10 years
Complete set
Intelligent radio signal range extender ReX
SmartBracket mounting panel
Power cable
Installation kit
Quick Start Guide
16550 ReX (BLACK) In stock
16551 ReX (WHITE) In stock
  Rex User Manual
External links*
Ajax website
Ajax support site

* External websites provide additional content that supports the content on however the external Web site is subject to change and is beyond the control of Connectec Ltd. Connectec cannot guarantee the accuracy of content on external websites and does not endorse the information or products on any external websites. You will be subject to the external websites own privacy policy when you follow these links.


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Why buy from Connectec?



Our technical support team are experienced installation engineers with years of field experience.



Customer service is our top priority. We always try to ensure we offer a first class service too all our customers.



We offer FREE mainland UK delivery on orders over £75 and FREE next day delivery on orders over £150*.



We are approved Ajax resellers for direct access to manufacturer warranty and support.

* Qualifying products only, subject to terms. For more information view our delivery information.

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