Ajax Doorbells

Q: Does the Ajax Doorbell include a chime?

Not a physical one. Unlike the Knightsbridge , Ener-J and Dahua doorbells in this range, which all include an indoor chime unit, the Ajax Doorbell alerts through the Ajax app, or through a compatible Ajax siren if you're running an Ajax alarm system. Worth knowing before ordering if a traditional audible chime is expected.

The Ajax Doorbell is a professional-grade AI video doorbell from Ajax Systems, best known for professional intruder alarm systems, at Harbro Electrical trade prices. Available in White and Black, both at £135.00 + VAT, in stock at our Peterlee trade counter and ready for UK mainland delivery.

Built-in AI classifies visitors as people, animals or vehicles before alerting, backed by a PIR sensor for a reliable secondary trigger. IP54 rated for outdoor use, it runs on an AC/DC power supply with a built-in backup battery rather than batteries alone, and connects over 2.4GHz Wi-Fi, with Ajax's Jeweller and Wings technology providing a backup connection to a compatible Ajax hub if the Wi-Fi drops.

All prices exclude 20% VAT. Same-day collection from our Peterlee trade counter at SR8 2LY, free UK mainland delivery on orders over £70. Looking for a different doorbell? See our full doorbells range or the wireless doorbells collection.

Both finishes £135.00 + VAT • same spec, same price AI detection people, animals and vehicles • PIR secondary trigger Power AC/DC with built-in backup battery • IP54 Same-day collection Peterlee SR8 2LY • 0191 518 1998

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Is the Ajax Doorbell right for your install?

Harbro stocks numerous other doorbells across the wireless and wired ranges. Here's where Ajax fits against each.

Ajax vs the budget options

Neither the Knightsbridge DC010 nor the Byron 720K has a camera at all - they're a push-and-chime pairing, wireless or hardwired, with no AI, no app, no video. If the job only needs to alert someone that a visitor's at the door, either is a fraction of the price. Ajax is the right upgrade when the job needs to see who's there, get a notification, or hold footage as evidence.

Ajax vs the mid-range video doorbells

Ener-J Smart Flexi, EZVIZ CS-DB1C/KIT and Dahua VDKP01-BG sit in a band around £49 to £70, wired or battery, 1080p to 2K, motion detection. Ajax's built-in AI classification, distinguishing people, animals and vehicles before alerting rather than triggering on any motion, is the meaningful difference over the passive-IR-only detection those three rely on, which is what causes false alerts from passing cars or next door's cat. Ajax also runs on a continuous AC/DC supply with backup battery, rather than the battery-charging cycle of Ener-J and EZVIZ or being fully dependent on mains like Dahua.

No included chime

Every other doorbell in the range comes with some form of chime - Knightsbridge's kit, Ener-J's USB chime, Dahua's Wi-Fi chime. Ajax doesn't. It alerts through the Ajax app, or through a compatible Ajax siren if you're running an Ajax alarm system as a chime substitute. Worth knowing before ordering, particularly if the expectation is a traditional audible doorbell sound rather than an app notification.

Which finish?

White and Black are the same doorbell, same specification, same price. The choice is purely which finish suits the door and surrounding brick or render.

Installation and positioning

The manufacturer's recommended mounting height is 1.2 to 1.5m (4 to 5ft). The Ajax Doorbell is designed for both indoor and outdoor use, but shouldn't be mounted in direct sunlight - prolonged exposure can cause the unit to overheat.

As a hardwired AC/DC device, connecting it to a mains-fed power supply, or bypassing an existing chime circuit using the included BellKit, falls under the same Part P considerations as any other hardwired video doorbell installation. See our full doorbell installation guide for wiring steps, transformer sizing and Part P guidance.

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Ajax Doorbells: frequently asked questions

What's the difference between the White and Black finishes?

None, functionally. Both are the same Ajax DoorBell - same AI detection, same PIR sensor, same IP54 rating, same £135.00 + VAT price. Choose whichever finish blends best with your door and surrounding brick or render.

Does the Ajax Doorbell need a wired power supply, or does it run on battery alone?

It needs a wired AC/DC power supply as its primary source - 12 to 24V DC or 16 to 24V AC - with a built-in backup battery for short interruptions rather than as the main power source. This is different from the Knightsbridge or Ener-J options in the range, which can run on battery alone.

Does the Ajax Doorbell need an Ajax alarm system to work?

No. It operates as a standalone video doorbell through the Ajax app over Wi-Fi. Pairing it with a compatible Ajax hub adds Jeweller and Wings technology as a backup communication channel for events and alerts if the Wi-Fi connection drops, but it isn't required for day-to-day use.

Does the Ajax Doorbell include a chime?

Not a physical one. Unlike the Knightsbridge, Ener-J and Dahua doorbells in this range, which all include an indoor chime unit, the Ajax Doorbell alerts through the Ajax app, or through a compatible Ajax siren if you're running an Ajax alarm system. Worth knowing before ordering if a traditional audible chime is expected.

Can the Ajax Doorbell be mounted anywhere, including in direct sunlight?

It's rated for both indoor and outdoor use, but the manufacturer advises against mounting it in direct sunlight, as prolonged exposure can cause the unit to overheat. Recommended mounting height is 1.2 to 1.5m.

What size power supply does the Ajax Doorbell need?

12 to 24V DC or 16 to 24V AC as a minimum. If it's being connected to an existing wired chime circuit via the included BellKit, a more powerful supply is needed - at least 3A at 12 to 24V DC, or 10VA at 16 to 24V AC. See our doorbell transformer collection for suitable options, or the doorbell installation guide for general sizing and Part P guidance.

How does the Ajax Doorbell compare to the Ener-J Smart Flexi or Dahua VDKP01-BG?

Ajax sits above both on price and adds AI classification, distinguishing people, animals and vehicles rather than triggering on any motion, which the cheaper video doorbells don't do. Ener-J and Dahua remain the better fit for a straightforward retrofit on a budget. Ajax is the choice where cutting down false alerts and running on a permanent power supply matter more than price. See our video doorbell comparison guide for the full breakdown of the other three.

Can I collect the Ajax Doorbell same day from the Peterlee trade counter?

Yes, both finishes are held in stock at our Whitworth Road trade counter - not ordered in. Same-day collection during opening hours: Monday to Thursday 7:30am to 5pm, Friday 7:30am to 4pm, Saturday 8:30am to 12:30pm.