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Ajax HomeSiren U Indoor Alarm Siren

Name: Ajax HomeSiren U Indoor Alarm Siren
Brand: Ajax
SKU: AJAX-HOMESIREN-U

£91.50

(£76.25 ex VAT)

sku: AJAX-HOMESIREN-U

A compact indoor siren with adjustable sound and LED indication. Adds alarms, entry/exit reminders and optional door-opening chimes to Ajax.

Requires a compatible Ajax hub and configured alarm devices. This siren does not detect smoke or carbon monoxide.

Colour

Keys Supplied: per lock ( total) total (unless ordering multiple groups)

Additional Keys are available below

Qty:

Shipping From:

When ordering multiple Keyed Alike locks, only 1 set of keys are provided as all additional locks are made to work from that key.

If ordering 4 or more keyed alike locks you can have them set up as different groups. If Required: Let us know the details in the "Specific Key Requirements" field above.

Each group of locks will then receive keys.

Make an alarm heard indoors. Without a bulky sounder.

HomeSiren U brings a clear audible warning and LED indication into a room. Its compact enclosure fits discreetly into an interior, with adjustable volume for the installation.

The right warning for the event.

Set the alarm volume from 81 to 105 dB at one metre and configure which events activate the siren. It responds to the Ajax system; it does not contain an intrusion or fire sensor.

No cable across the room.

Two included CR123A batteries provide up to five years of operation. Jeweller carries events and commands between the siren and hub, with supervision and low-battery reporting in the app.

A secure place to sound.

SmartBracket and the holding screw secure the siren to the mounting surface. Ajax recommends a position at least 2.5 metres high, with good radio reception and a location that is difficult to interfere with.

What you need. Fitting and setup.

You need a compatible Ajax hub and the detectors or events that will activate the siren. Fit it indoors on a secure surface, check Jeweller reception and configure the alarm volume and indications. No mains, CAT6 or cable back to the hub is required; the batteries are supplied. Only an optional external LED needs a local wire. Test audibility as part of the complete system without prolonged close exposure to the sounder. Use an outdoor-rated siren for an exposed exterior position.

Explore Hub 2 Plus Fitting and setup guide Technical specifications

Part	Size (mm)
width	76
Height	75
Depth	27

Brand

SKU

AJAX-HOMESIREN-U

Network Connection

Jeweller radio

Power Supply

2 x CR123A batteries, pre-installed

Enclosure Protection

IP50

Radio Range

Up to 2,000 m in open space

Battery Life

Up to 5 years

Alarm Volume

81-105 dB at 1 m, adjustable

Hub Requirements

Compatible Ajax hub required

Operating Temperature

-10 to +40 C

FAQs

No. It is intended for indoor installation. StreetSiren is the outdoor option in this pilot.

No. It sounds in response to configured Ajax system events. Appropriate detectors are required separately.

Yes. The U model offers 81-105 dB at one metre. These figures differ from the older non-U HomeSiren.

Yes, with a compatible opening detector, hub and configured Chime feature.

No. Two pre-installed CR123A batteries provide power. The optional LED connection is not a siren power input.

Configured entry and exit beeps help make alarm delays understandable during everyday use.

With a compatible opening detector and Chime enabled, the siren can announce a door opening while the system is disarmed.

LED indications show configured system states. An optional wired 3 V LED can repeat the built-in indication at another suitable point.

Related Products

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Ajax Hub 2 Plus Alarm Hub

£344.50

(£287.08 ex VAT)

sku: AJAX-HUB2-PLUS

An Ajax alarm hub with Ethernet, Wi-Fi and two mobile SIM slots. Brings compatible detectors, sirens and automation together in the Ajax app.

Detectors, sirens and optional mobile service are required separately. The hub is not a video recorder or a camera power supply.

Colour

Keys Supplied: per lock ( total) total (unless ordering multiple groups)

Qty:

Shipping From:

When ordering multiple Keyed Alike locks, only 1 set of keys are provided as all additional locks are made to work from that key.

If ordering 4 or more keyed alike locks you can have them set up as different groups. If Required: Let us know the details in the "Specific Key Requirements" field above.

Each group of locks will then receive keys.

At the centre of your protection. Ready for everyday life.

Arm the alarm, see which detector has triggered and manage access from the Ajax app. Hub 2 Plus connects the alarm devices around your property, with space to add compatible fire detectors and automation as your needs grow.

Several ways to get the message through.

Ethernet, Wi-Fi and two mobile SIM slots give the hub alternative routes to Ajax Cloud. Configure more than one route for resilience. Mobile connectivity needs compatible SIMs, coverage and an active service; switching between SIMs can take up to four minutes.

See the reason for an alarm.

A compatible MotionCam detector can send a sequence of photographs with an alarm, helping you understand what happened before deciding how to respond. Photo-on-demand and scenario features depend on the detector and permissions. Continuous camera recordings need their own storage, not the hub.

Alarm verification with photo in 9 seconds

Separate areas. One manageable system.

Up to 25 security groups let different areas follow different routines. The hub supports up to 200 devices and 200 users, while up to 64 scenarios can connect events to compatible lights, relays or other automation devices. Each accessory and its installation is separate.

Protection of large premises with complex internal organization

Choose the hub for the site. Connectivity, capacity and power.

Hub 2 Plus is our main choice for a home: Ethernet, Wi-Fi and mobile backup in one hub. Hub 2 (4G) is a smaller-capacity alternative without Wi-Fi. Hub BP is the specialist battery-powered option for sites without a suitable mains supply. These are alternatives, not three hubs needed together.

Scroll across if needed to compare prices and specifications.

Product prices and specifications. Configurable products show family options and starting prices.
	Ajax Hub 2 Plus Alarm Hub View product	Ajax Hub 2 (4G) Jeweller View product	Ajax Hub BP Jeweller View product
Price Including VAT	From £344.50	From £287.95	From £279.95
Network connection	Ethernet, 2.4 GHz Wi-Fi and two micro-SIM slots (2G/3G/4G)	Ethernet and two SIM slots (2G/3G/4G); no Wi-Fi	Two SIM slots (2G/3G/4G)
System capacity	Up to 200 devices, 200 users, 25 groups, 50 rooms and 64 scenarios	Up to 100 devices, 50 users, 9 groups and 32 scenarios	Not specified
Power supply	110-240 V AC, 50/60 Hz; built-in 3 Ah backup battery	Mains power with built-in backup battery	Supported internal or external battery, purchased separately
Battery life	Backup up to 15 hours with Ethernet disconnected and SIM communication only	Not specified	Not specified
Size (W x H x D)	163 x 163 x 36 (mm)	163 x 163 x 36 (mm)	238 x 196 x 100 (mm)

What you need. Fitting and setup.

Provide a suitable mains socket and an internet connection through Ethernet or Wi-Fi. Run an Ethernet cable to the router if using the wired route; detector cabling is not required for compatible Jeweller devices. Fit and configure any SIMs, mount the hub on SmartBracket, then add and test each detector and siren. Check radio coverage before fixing devices permanently. A qualified alarm installer should design the coverage, set delays and test the complete system. Monitoring and mobile subscriptions are separate services.

Fitting and setup guide Technical specifications

Part	Size (mm)
width	163
Height	163
Depth	36