At a glance
- Protection Class
- IP20
- Operating Temperature
- -10 °C to +40 °C
- Dimensions
- 163 × 163 × 36 mm
- Radio Range (Open Space)
- Up to 1,800 m
- Range Extenders per Hub
- Up to 5
- Communication Loss Detection
- After 36 s
In the box
- ReX Jeweller
- SmartBracket mounting panel
- Power cable
- Installation kit
- Quick start guide
Model RX.Y.JAjax ReX Jeweller Wireless Range Extender, up to 1,800 m Radio Range
₹15,936 Incl. GST
₹13,505 + 18% GST
At a glance
- Protection Class
- IP20
- Operating Temperature
- -10 °C to +40 °C
- Dimensions
- 163 × 163 × 36 mm
- Radio Range (Open Space)
- Up to 1,800 m
- Range Extenders per Hub
- Up to 5
- Communication Loss Detection
- After 36 s
Extends the radio reach of an Ajax alarm to detectors in distant rooms, upper floors or outbuildings, relaying their signals to the hub. Up to 1,800 m from the hub in open space, mains powered with a built-in 2 Ah backup battery; works with Ajax hubs.
- WarrantyManufacturer warranty under Ajax's terms: 2 years. Warranty claims
- DeliveryPrice, availability and delivery charges are confirmed in your quotation. Shipping and delivery
Overview
The Ajax ReX Jeweller is a range extender for Ajax wireless alarms. It relays the radio signals of detectors in distant rooms, upper floors or outbuildings to the hub, so a large home, office or building can be covered by one system. It is mains powered with a built-in backup battery and works with Ajax hubs.
Is it right for you?
- Choose it when detectors in a far wing, upper floor, basement or outbuilding cannot reach the hub reliably.
- Up to 5 range extenders can be added to a hub and each can carry up to 249 devices, depending on the hub model.
- It relays alarms and events only. If you use MotionCam detectors and need their photos relayed, choose the ReX 2 Jeweller instead.
- It is for indoor use only, so it needs a dry room with a mains socket.
Key features
- Extends the Ajax Jeweller radio: up to 1,800 m between the range extender and the hub in open space.
- Two-way encrypted communication with frequency hopping to resist interference and jamming.
- Alarms reach the hub in 0.3 s.
- Mains powered from 110 to 240 V, drawing up to 6 W, with a built-in 2 Ah lithium-ion backup battery.
- Can run from 12 V DC instead with the 12 V PSU for Hub/Hub Plus/ReX, which is sold separately.
- Tamper alarm when it is taken off the wall or its mounting panel.
- Communication loss reported after 36 s, depending on settings.
- 163 x 163 x 36 mm, 330 g, in black or white.
What else you need
An Ajax hub. Compatible hubs include Hub (2G), Hub (4G), Hub Plus, Hub 2 (2G), Hub 2 (4G), Hub 2 Plus, Hub BP, Superior Hub G3, Superior Hub Hybrid and Superior Hub Hybrid 2.
A mains socket near the mounting point, or the 12 V PSU for Hub/Hub Plus/ReX if you want to run it from a 12 V DC supply.
The Ajax app, where it is added, configured and monitored.
Installation
An Ajax installer can survey the signal, choose a position between the hub and the far detectors, and fix the SmartBracket mounting panel. The range extender is then added in the Ajax app and detectors are assigned to it.
Before you buy
Indoor use only, from -10 to 40 °C and up to 75% humidity, IP20.
Units made after 7 October 2022 have a 3-pin battery; earlier units may have a 2-pin or 3-pin one. Check before ordering a replacement battery.
The number of range extenders and devices per extender depends on the hub model.
Technical specifications
Key facts
- What is it?
- Alarm accessoryBrand Ajax, model RX.Y.J
- How is it powered?
- Main: 110 to 240 V, 50/60 Hz
- Can it be used outdoors?
- IP20
- What comes in the box?
- ReX Jeweller; SmartBracket mounting panel; Power cable; Installation kit and 1 more
- Which documents are available?
- Datasheet, online manual, software (2), regional compliance reference (2), online specifications (3) Open documents
- Can SecurityGearHub help with installation?
- Setup guidanceManuals, wiring guides and answers to setup questions. On-site work is arranged separately where available. Ask about installation
RelatedDocumentsAll Ajax documents
General
- Manufacturer model
- RX.Y.J
- Frequency Bands
- 866.0 to 866.5 MHz, 868.0 to 868.6 MHz, 868.7 to 869.2 MHz, 905.0 to 926.5 MHz, 915.85 to 926.5 MHz, 921.0 to 922.0 MHz (depends on sales region)
- Maximum Effective Radiated Power
- Up to 25 mW
- Radio Range (Open Space)
- Up to 1,800 m (between ReX and hub)
- Encryption
- Block encryption with dynamic key
- Frequency Hopping
- Yes
- Communication Loss Detection
- After 36 s (depends on Jeweller settings)
- Range Extenders per Hub
- Up to 5 (depends on hub model)
- Devices per Range Extender
- Up to 249 (depends on hub model)
- Alarm Delivery Time
- 0.3 s
- Main Power
- 110 to 240 V, 50/60 Hz; up to 6 W
- Backup Battery
- Built-in Li-ion, 3.7 V, 2 Ah
- Alternative Power
- 12 V DC via 12 V PSU for Hub/Hub Plus/ReX (sold separately)
- Power supply
- Main: 110 to 240 V, 50/60 Hz (Up to 6 W of mains power consumption); Backup: built-in rechargeable battery Li-ion 2 Ah, built-in backup battery, Rechargeable Li-ion Polymer Battery XK 953562T, 3.7 V DC, 2 Ah, Calculated battery life:, Manufacturer (Up to 24 hours of backup battery life when Ethernet is disabled. Up to 35 hours of backup battery life. Up to 4 hours of maximum time to recharge a backup battery of maximum capacity to 80% of its rated capacity. * From the backup battery after the loss of the main power supply. The range extender manufactured after October 7, 2022, has a 3-pin battery. If the range extender was manufactured earlier, the battery can be a 2-pin or 3-pin one. To find out the battery type, contact Ajax Technical Support or check it manually); Dongguan Lean Power: UL listed; Type: type A, Quiescent device’s current consumption at nominal voltage, 11.4 mA, Maximum device’s current consumption at nominal voltage, 14 mA; Low battery voltage: 3.7 V DC; Low battery recovery voltage: 4.1 V DC; End-of-life battery voltage: 3.6 V DC, Minimum energy level for a backup battery in the charged state, 100% (Device is switched off); Alternative: 12 V DC (Connected via an alternative power supply unit 12 V PSU for Hub/Hub Plus/ReX which is sold separately)
Protection
- Tamper Alarm
- Yes
Environment
- Operating Temperature
- -10 °C to +40 °C
- Operating Humidity
- Up to 75%
- Protection Class
- IP20
Physical
- Enclosure
- Dimensions: 163 × 163 × 36 mm; Weight: 330 g; Operating temperature range: from -10 °C to +40 °C; Operating humidity: up to 75%; Protection class: IP20
- Dimensions
- 163 × 163 × 36 mm
- Weight
- 330 g
- Colours
- Black, White
- Warranty
- Manufacturer warranty under Ajax's terms: 2 years. How claims work
Product attributes and shipping details
| Brand | Ajax |
|---|---|
| Colour | Black, White |
| IP Rating | IP20 |
| Alarm Technology | Jeweller |
Downloads
Download software
- Ajax Security System (iOS)Version 3.59 · iOS 18.0+ · Released October 28, 2026Prerequisites: Compatible Ajax hub; Ajax account; Device is added to a compatible Ajax hub and configured in Ajax apps (hub required)Licence: Free; account requiredSoftware · Family · apps.apple.comView official download page
- Ajax Security System (Android)Android · Released November 9, 2026Prerequisites: Compatible Ajax hub; Ajax account; Device is added to a compatible Ajax hub and configured in Ajax apps (hub required)Licence: Free; account requiredSoftware · Family · play.google.comView official download page
Documentation
- Ajax RX.Y.J datasheet (ReX Jeweller)Datasheet · Family · 2.4 MBDownload
- Ajax ReX Jeweller product pageOnline specifications · Family · ajax.systemsView official page
- Ajax ReX Jeweller technical specifications pageOnline specifications · Family · ajax.systemsView official page
- Ajax device compatibility with hubs and control elementsOnline specifications · General · ajax.systemsView official page
User manual
- Ajax ReX Jeweller: Online manualOnline manual · Family · ajax.systemsView official page
Series documents can differ from your exact model. Report a wrong or missing file
Questions about this product
Does it relay photos from MotionCam detectors?
No. ReX Jeweller relays alarms and events over the Jeweller protocol only. The ReX 2 Jeweller relays photos as well.
How far does it reach?
Up to 1,800 m between the range extender and the hub in open space. Walls and floors reduce this.
What happens in a power cut?
A built-in 2 Ah backup battery keeps it running.
How many can I add to one hub?
Up to 5, depending on the hub model.
Does it need an internet connection?
No. It talks to the hub by radio; the hub handles the internet connection.
Can it be used outdoors?
No, it is for indoor use only.
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