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Description
AJAX VHF Bridge Jeweller TransponderEnsure Unfailing Alarm Delivery with the AJAX VHF Bridge Introducing the AJAX VHF Bridge, a crucial transponder that provides your Ajax security system with an additional, ultra reliable channel to communicate with a monitoring station. Designed for ultimate resilience, this module allows you to use Ajax systems in locations with unstable or non existent internet connections, such as nature reserves, mountainous regions, or remote properties. By
Ensure Unfailing Alarm Delivery with the AJAX VHF Bridge
Introducing the AJAX VHF Bridge, a crucial transponder that provides your Ajax security system with an additional, ultra-reliable channel to communicate with a monitoring station. Designed for ultimate resilience, this module allows you to use Ajax systems in locations with unstable or non-existent internet connections, such as nature reserves, mountainous regions, or remote properties. By transmitting alarms and system events over VHF radio waves across vast distances, the vhfBridge ensures your security is never compromised, serving as either a primary or a backup communication link.
Core Features & Benefits
- Internet-Free Alarm Transmission: Guarantees that alarms are sent to the central monitoring station via VHF radio waves, completely independent of an internet connection.
- Universal Compatibility: Seamlessly integrates with any third-party VHF transmitter that has relay inputs, offering you flexibility and choice.
- Proprietary Jeweller Radio Technology: Leverages Ajax's secure, two-way communication protocol. It features block encryption, protection against spoofing, and frequency hopping to prevent jamming, ensuring all data is secure.
- Extended Communication Range: Achieves a remarkable radio communication range of up to 1,800 meters (5,900 ft) in open space between the module and the Ajax hub or a range extender.
- Impressive Power Autonomy: In the event of a power outage, an optional 7 Ah backup battery (not included) can power both the vhfBridge and the connected VHF transmitter for up to 75 hours.
- Advanced Anti-Sabotage: The device is equipped with two tampers that provide instant notification of any attempt to open the casing or detach it from the surface.
- Effortless Configuration: All 8 transistor outputs are easily configured through the user-friendly Ajax mobile and desktop apps, allowing you to specify exactly which events trigger an alarm.
Technical Specifications
| Feature | Specification |
|---|---|
| Classification | Transponder for communication with a monitoring station via VHF transmitter |
| Installation | Indoor only |
| Hub Compatibility | Hub Plus, Hub 2, Hub 2 Plus, Hub Hybrid |
| Range Extender Compatibility | ReX, ReX 2 |
| Communication Technology | Jeweller (868.0–868.6 MHz) |
| Radio Communication Range | Up to 1,800 m (5,900 ft) in an open space |
| Number of Outputs | 8 potential transistor outputs |
| Output Types | High potential (positive trip) & Low potential (negative trip) |
| Operation Modes | Pulse and bistable |
| Main Power Supply | 100–240 V, 50/60 Hz |
| Backup Power | 12 V⎓ battery, 4 or 7 Ah (not included) |
| VHF Transmitter Power Output | 10.5–15.5 V⎓, up to 2 A |
| Sabotage Protection | Device authentication against spoofing, 2 tampers for casing intrusion/detachment |
| Operating Temperature Range | From -10°C to +40°C (14°F to 104°F) |
| Operating Humidity | Up to 75% |
| Enclosure Protection Class | IP40 |
| Dimensions | 196 × 238 × 100 mm (7.72″ × 9.37″ × 3.94″) |
| Weight | 840 g (29.63 oz) |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.5 ★★★★★
Based on 13 reviews
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Product Reviews
★★★★★ 4
Normally amazing
Color: Spiky Ball (Blue, Orange), Size: Medium
We have purchased these slightly spiky dog balls several times for our very strong jaw heavy chewer dogs and they’ve been amazing. They don’t break down they don’t get torn apart the squeakers don’t even pop out of them.
So we ordered another package because we’ve lost a few outside to the lawnmower… oops and the package that got delivered today had only one ball that squeaks and the other does not. THIS IS A PROBLEM ! Unfortunately my female dog got to the new squeaking ball first and my male got to the non-squeaking ball and he was NOT happy. Basically once they claim a ball it’s theirs and the other dogs don’t go near the ball they claimed. So he’s following my female around and every time she squeaks the ball and I’m just waiting for him to attempt to take it from her causing damage to her. Normally… These are amazingly fun, tough, durable but also squeaking balls (that’s rare in a tough ball) that my dogs absolutely love.
This time just got a bad batch I guess. When they squeak the dogs LOVE them. After several months of play the squeaker might break inside of the ball but the ball never comes apart or gets damaged. And we as the owners love that they don’t break down are not able to be ripped or torn even by our very strong jawed and big jaw muscle dogs.
They are also great for in the house play because they’re small enough that they fit completely inside our dog‘s mouth but obviously not small enough to get swallowed so when we throw them in the house for fetch the dogs can jump up and catch them fully in their mouth so they don’t cause any damage to the walls when they hit the walls. They’re not super heavy but they’re incredibly durable.
Definitely worth the price especially if you have heavy chewers or big jaw muscle dogs.
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Reviewed in the United States on April 28, 2026
★★★★★ 5
Best fun indestructible toy
Color: Crinkle Duck (Yellow), Size: Large
Truly indestructible no matter how much our oittie tries. She has owned it for three months works at destroying every day with no success. She carries it everywhere. Best purchase for chewer, more fun than the popular rubber heavy duty toy. Do not hesitate your pup will thank you for this fun distraction.
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Reviewed in the United States on May 30, 2026
★★★★★ 5
My dog loves this toy!
Color: Bunny (Gray), Size: Large, Color: Bunny (Gray), Size: Large
High quality, big toy, perfect for a medium to large size dog. After a few months of serious chewing I had to buy another one, but well worth the money! Rocky loves it.
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Reviewed in the United States on June 11, 2026
★★★★★ 4
Great toy but if your dog is an aggressive chewer, please think twice.
Color: Crinkle Chicken (Brown), Size: Large
I received this on May 23rd and on June 8th, after playing with this thing every day, our recently acquired 36 lb dog finally ripped it open and got out all the plastic and the squeaky part. Lily Belle will miss you, chicken.
Lily loooooved this toy! She'd toss it in the air, chew on it, pull it with her teeth etc. but as much as she loved it, we won't replace it. It's just not durable enough for her.
If your dog is an aggressive chewer, you might want to try a different toy. I hate that this lasted just a smidge over two weeks because Lily seemed to truly enjoy this toy.
RIP, squeaky chicken!
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Reviewed in the United States on June 9, 2026
★★★★★ 5
Great Value Toy
Color: Crinkle Duck (Blue), Size: Large, Color: Crinkle Duck (Blue), Size: Large
This toy has been one of my dog’s absolute favorites. He gets excited every time he sees it and will carry it around the house, toss it in the air, and keep himself entertained for a long time. The shape and texture seem perfect for him, and it quickly became one of his go-to toys over everything else in his basket.
What I really like is that it holds up reasonably well for the price. It’s definitely not indestructible, and after a lot of play, it will sometimes start to rip—usually around the feet first since that’s where my dog tends to grab and chew the most. But honestly, considering how affordable it is, I don’t mind replacing it when needed. It’s inexpensive enough that rebuying feels worth it because he genuinely loves it that much.
I’d rather keep buying a toy he is obsessed with than spend more on something that just sits untouched. It’s fun, cute, and keeps him happy, which is what matters most. Overall, I’d definitely recommend it for dogs who love plush toys and playful chewing.
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Reviewed in the United States on April 28, 2026