Here is the short answer: the Ajax DoorBell is a 4MP HDR video doorbell with PIR and AI detection that lives on the same system and app as an Ajax alarm — which is the whole point of it. Most video doorbells are an island: their own app, their own alerts, their own login. This one is a device on your security system, wired to a 12–24V supply, connected over Wi-Fi alongside Ajax's own radio links, and it turns the front door into part of the alarm rather than a gadget beside it.
In brief:
- 4MP HDR video with PIR and AI-powered detection at the door, in white or graphite, £206.76.
- One app for doorbell, alarm, fire and water — the family answers the door from the same place they arm the house.
- Wired 12–24V supply: no battery to die in January, but budget the connection into fitting.
Video doorbells earned their place — parcels, callers, the reassurance of seeing the door from anywhere. What they never earned was a second security system's worth of apps and accounts running alongside the alarm. Ajax's answer is characteristic of the brand: build the doorbell as a proper device on the security platform. We have it on the counter at Villa Road, and this is the honest read.
What is the Ajax DoorBell, exactly?
A wired video doorbell — 12–24V supply — with a 4MP HDR camera, a PIR sensor and AI detection to tell callers from passing traffic, connecting over Wi-Fi alongside Ajax's Jeweller/Wings links to your hub. It comes in white and graphite, both £206.76. HDR matters at a front door more than most spots: the doorstep is a face in shadow against a bright street, which is precisely the scene HDR exists to balance.
Why does being on the alarm system matter?
Three practical wins. One app: the doorbell rings where the alarm lives, so every household member already set up as an Ajax user answers the door — no separate accounts, no "it's on your phone, not mine". One event history: the caller at 14:12 and the alarm events sit on the same timeline, which is exactly what you want when something needs piecing together. One ecosystem to grow: the same hub already runs the fire detection, the WaterStop and the outdoor detectors — the DoorBell is the front-door piece of that whole, not another silo.
Trade tip: the wired supply is the feature disguised as a chore. Battery doorbells die on the coldest week and come off the wall to charge; a 12–24V feed means it simply works, permanently. If there is an old wired chime, its transformer position is the first thing to check; if not, a small doorbell transformer beside the consumer unit is a modest job for an electrician — plan it into the fitting rather than discovering it on the ladder.
Who should buy it — and who shouldn't?
Buy it if you run an Ajax system, or you are about to — the kit guide covers starting points — and you want the door on the same platform as everything else. Look elsewhere if you have no Ajax system and no plan for one: as a standalone doorbell it is fighting cheaper rivals on their home turf without its main advantage, and our video doorbell round-up covers that market honestly. The DoorBell's case is the system; buy it for the system.
Ajax DoorBell, Summarised
| Question | Answer |
|---|---|
| Camera | 4MP with HDR |
| Detection | PIR plus AI detection |
| Power | Wired, 12–24V |
| Connectivity | Wi-Fi, alongside Jeweller/Wings to the hub |
| Colours | White / Graphite |
| Price | £206.76 |
| Best for | Ajax households wanting one app for door and alarm |
Expert Help in the West Midlands
Villa Road, Birmingham, since 1975. The DoorBell is on the counter — press it, watch the app, judge the image for yourself. Bring a photo of your door reveal and existing chime wiring and we will tell you in two minutes what the fitting involves at your house, including the honest "you'll want an electrician for the transformer" where that is true.
Browse the Ajax range. Get in touch for a spec.
Related reading: Ajax vs Ring and the best video doorbells.
Frequently Asked Questions
Does the Ajax DoorBell need an Ajax alarm?
It is designed as a device on the Ajax system, and that integration is its main advantage — one app for door and alarm. If you have no Ajax system and no plan for one, a standalone doorbell serves you better.
Is the Ajax DoorBell wired or battery?
Wired, on a 12–24V supply — which means no winter battery deaths and no taking it off the wall to charge. If there is no existing doorbell supply, a small transformer is a modest electrician's job worth planning in.
What resolution is the Ajax DoorBell?
4MP with HDR — and HDR is the part doing the work at a doorstep, balancing a shaded face against a bright street so callers are actually recognisable.