Delivery info

We deliver free of charge to our customers in SA. Delivery is generally within 2-5 working days, depending on your location.

Returns Policy

Not the right item? Amatron has a return policy of 14 days from the delivery date. Please note, returned products with damaged packaging cannot be swapped or refunded.


The warranty for Ajax devices is valid for two years after the purchase date and does not apply to the supplied battery.

The Byrna HD launcher has a 1-year warranty. Using third-party projectiles or CO2 canisters with your Byrna HD will void your warranty.

The IMILAB surveillance products have a 1-year warranty.

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Additional information

Weight N/A
Dimensions N/A

Transponder for communication with the monitoring station via a VHF transmitter

Installation method


Number of potential outputs



Operates with Hub 2, Hub Plus, Hub 2 Plus

Primary Power Supply

100–240 V, 50/60 Hz

Backup Power Supply

12 V DC, up to 75 hours of power for a transponder and a transmitter.

Supported battery type

12 V battery with a full charge cycle of up to 30 hours.

The maximum battery size installed in the casing should be 150 × 64 × 94 mm

Jeweller radio protocol

Communication range — up to 1,800 meters in a line of sight
Two-sided communication between devices
Operating frequencies: 868.0–868.6 MHz
Auto-regulated radio signal power: ≤ 25 mW
Blocking encryption based on the AES algorithm
Detector ping interval: 12–300 seconds
Frequency hopping


Protecting against forgery
Jamming notifications
Tampers against opening and removal
Backup battery

Operating temperature range

From -10°C to +40°C

Permissible humidity

Up to 75%


196 × 238 × 100 mm (with casing)
145 × 89 × 51 mm (without casing)


840 g (with casing)
165 g (without casing)


24 months from the date of sale

Complete set

Power cable
12 V battery connection cable
Installation kit
Casing (depends on a set)
Quick start guide


Black, White

Output Types

Positive trip and negative trip (depends on the settings)

Transmission Types

Pulse and bistable (depends on the settings)

Compatibility with third-party VHF radio transmitters

vhfBridge connects to any VHF transmitter with relay inputs

Support for photo verification of alarms


VHF transmitter power

12 V DC, 2 A

Maximum radio signal power

≤ 25 mW

Protection class


Ajax vhfBridge

Ajax vhfBridge

R2,769.00 inc. VAT