Cookies help us deliver our services. By using our services, you agree to our use of cookies. Learn more.
Product ID Rex-B

Ajax Black Rex Intruder Alarm

In Stock 0
0 reviews | Write a review

Free Shipping

  • Summary
  • Full Spec


Security on a massive scale: ReX is the radio signal range extender that boosts the range of all Ajax security system devices and manages their communication with the hub. The intelligent radio signal range extender 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.

Reliable link for secure communication: ReX can manage some or all the devices in the system. Yet, the number of connected devices does not affect the alarm delivery speed.

Enhances the security system: 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.

The second decision-making center: RReX 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.

Holds off the intruder attacks: The OS Malevich unique operation logic protects ReX against software and hardware attacks and makes it resistant to viruses or exploits. Moreover, all the ReX communications are encrypted, which makes any signal interception practically impossible. And even during a blackout, ReX will continue to stay on guard of your property using the in-built back-up battery.

Intuitive connection and installation: To connect ReX to the system, scan the QR code, name it, and switch it on. Then, select the devices which should operate via the range extender from the list. Proceed by installing ReX in a safe spot. No disassembling required. Just use the SmartBracket mount.

Key Features

  • Transmits alarms in 0.3 seconds
  • Manages the devices if the hub connection is lost
  • Communicates at a distance of up to 1800 m
  • Operates up to 35 hours on the back-up battery
  • Up to 5 range extenders can operate in the security system
  • 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
Tech specs
Classification Radio channel range extender
Device type Wireless
Installation method Indoors

Operates only with Hub, Hub Plus and Hub 2 featuring OS Malevich 2.8 and later

* 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

Max number of connected ReX per hub*

Hub — 1

Hub Plus — 5

Hub 2 — 5

*ReX can only be directly connected to the hub. ReX cannot be connected to another ReX

Operating system OS Malevich
Power supply

Mains supply: 110-240 V

Battery backup: Li-Ion 2 A·h

Up to 35 hours of offline operation

Jeweller radio technology

Communication range with detectors — up to 1,800 m in an open space

Two-way communication between devices

Operating frequencies — 868.0-868.6 MHz

Self-adjusting RF output power — up to 25 mW

Block encryption based on AES algorithm

Detector polling period — 12-300 s

Frequency hopping

Operating temperature range From -10°C to +40°C
Permissible humidity Up to 75%

Protection against fraud

Jamming detection


Dimensions 163 × 163 × 36 mm
Weight 330 g
Warranty Within 24 months from the date of sale
Complete set

Intelligent radio signal range extender ReX

SmartBracket mounting panel

Power cable

Installation kit

Quick Start Guide

Product Reviews
Be the first to review this product