Updated November 2026. A wireless alarm system lets you protect a flat, a shop or an office without chasing cables through finished walls. This guide compares the Ajax and Dahua wireless alarm ranges we list: how each hub sends alerts to your phone, which detectors to use where, and how to plan a sensible starter kit. Prices shown are current catalogue prices including 18% GST.
How a wireless alarm system works
Every system has three parts. The hub (also called the control panel) is the brain. Detectors such as motion sensors and door contacts report to it over radio. Sirens, keypads and key fobs let you hear an alarm and arm or disarm the system. When a detector trips while the system is armed, the hub sounds the sirens and pushes an alert to the mobile app, and on some models sends SMS or makes a phone call.
Wireless detectors pair only with a hub from the same family. Ajax Jeweller devices work with Ajax hubs, and Dahua W2 devices work with Dahua hubs, so choose the hub first and build the rest of the kit around it.
Choosing the hub: how it reports
The hub decides how reliably an alarm reaches you. Ethernet is the primary path in most homes and offices, but a router can lose power or the broadband line can be cut. A SIM card slot gives a backup path over the mobile network, and a hub with two SIM slots lets you use two operators. 2G coverage varies by operator and location, so check signal strength at the site before choosing a 2G-only model. Browse the full range under alarm hubs and panels.
| Hub | Reporting paths | Capacity | Price incl. GST |
|---|---|---|---|
| Dahua DHI-ARC3000H-FW2 | Ethernet, Wi-Fi, cellular (dual SIM, one active at a time) | 150 wireless peripherals | ₹15,228 |
| Dahua ARC3808H hybrid panel | Ethernet, Wi-Fi, optional 2G/3G/4G | 8 wired inputs, expandable to 128 wired or wireless | ₹12,833 |
| Ajax Hub (2G) Jeweller | Ethernet, one 2G SIM | Up to 100 devices, 50 users | ₹21,523 |
| Ajax Hub (4G) Jeweller | Ethernet, one 4G (LTE) SIM | Up to 100 devices, 50 users | ₹23,875 |
| Ajax Hub 2 (4G) Jeweller | Ethernet, two SIMs (2G/3G/LTE) | Up to 100 devices, photo verification | ₹43,985 |
| Ajax Hub 2 Plus Jeweller | Wi-Fi, Ethernet, two SIMs (2G/3G/LTE) | Up to 200 devices, 200 users | ₹51,787 |
A few points the table does not show:
- The Ajax hubs run on mains power and have a built-in backup battery rated for up to 15 hours of offline operation when Ethernet is switched off.
- The Ajax Hub (2G) does not support MotionCam detectors. If you want a photo with every alarm, choose a Hub 2 model such as the Hub 2 (2G) Jeweller at ₹30,295 or the Hub 2 (4G).
- The Dahua DHI-ARC3000H-FW2 has a built-in lithium battery and can send SMS and phone call alerts as well as app notifications.
- The Dahua ARC3808H suits sites that already have wired detectors and want to add wireless ones. Its 12 V, 7 Ah backup battery is not included.
Detector types and where they go
Motion detectors
A PIR motion detector covers a room or corridor. The Ajax MotionProtect Jeweller (₹7,984) covers up to 12 m with pet immunity up to 20 kg, and the Dahua ARD1233-W2 (₹3,756) also covers up to 12 m. In rooms with air conditioners or heat sources, a dual-tech detector that adds a microwave sensor cuts false alarms: the Ajax MotionProtect Plus Jeweller (₹11,171) or the Dahua ARD2231-W2 (₹6,673). For photo verification, look at the Ajax MotionCam Jeweller (₹18,335) or the Dahua ARD1731-W2 with camera (₹11,464). See all motion detectors.
Door and window sensors
A magnetic contact alarms the moment a door or window opens. The Ajax DoorProtect Jeweller (₹4,796) and Dahua ARD323-W2(S) (₹3,080) are the basic options. The Ajax DoorProtect Plus Jeweller (₹7,164) and Dahua ARD324-W2(S) (₹3,371) add shock and tilt detection, useful on shop shutters and ground floor windows. Compare models under door and window sensors.
Glass-break detectors
A glass-break detector listens for breaking glass, so one unit can cover a shopfront or a wall of windows. The Ajax GlassProtect Jeweller (₹7,984) works from 0.3 to 9 m, and the Dahua ARD512-W2 (₹3,935) covers up to 9 m. The Ajax CombiProtect Jeweller (₹11,171) combines a motion sensor and a glass-break microphone in one housing. More in glass-break detectors.
Panic buttons
A panic button is normally set to raise an alarm whether or not the system is armed. Fit one under a shop counter or at a reception desk. Options include the Ajax Button Jeweller (₹3,976), the Ajax DoubleButton Jeweller hold-up device (₹3,976) and the Dahua ARD821-W2 (₹2,070).
Sirens
An indoor siren startles an intruder; an outdoor siren tells the neighbourhood. Indoor choices are the Ajax HomeSiren Jeweller (₹7,984) and the Dahua ARA12-W2 (₹4,620). For outside, the Ajax StreetSiren Jeweller (₹15,936) works indoors and outdoors, and the Dahua ARA13-W2 (R) with light (₹7,246) is adjustable from 95 to 104 dB. Browse alarm sirens.
Keypads and key fobs
Family members and staff need a simple way to arm and disarm. Key fobs such as the Ajax SpaceControl Jeweller (₹3,976) and Dahua ARA24-W2 (₹2,310) have arm, disarm and panic buttons. A wall keypad suits shared spaces: the Dahua ARK30T-W2 (₹4,919) accepts a password or IC card, the Ajax KeyPad Jeweller costs ₹12,749 and the Ajax KeyPad Plus Jeweller (₹15,936) also reads encrypted contactless cards and key fobs. See keypads and remotes.
Planning a starter kit
A two or three-bedroom flat
Protect the main door, any balcony door, and the hall that every room opens onto. The Dahua ART-ARC3000H-03-FW2 wireless alarm starter kit (₹21,388) already includes the hub, a door detector, a PIR detector and a key fob. Add a second ARD323-W2(S) for the balcony and an ARA12-W2 indoor siren. On Ajax, a typical flat kit is the Hub (4G), one DoorProtect per entry door, one MotionProtect for the hall, a HomeSiren and a SpaceControl fob for each adult.
A shop
Shops face shutter forcing, broken glass and robbery during opening hours. Use a shock and tilt sensor on the shutter, a glass-break detector facing the shopfront, a motion detector at the back, an outdoor siren above the entrance and a panic button under the counter. A camera detector lets you check a photo before calling anyone. The Dahua ART-ARC3800H-03-FW2 Hub 2 starter kit (₹27,034) adds alarm video upload from up to 8 IP camera channels, while on Ajax a Hub 2 (4G) with a MotionCam gives photo verification and two SIM paths.
An office
Offices need more users, more zones and staff who arm and disarm with cards. The Ajax Hub 2 Plus handles up to 200 devices and 200 users and reports over Wi-Fi, Ethernet and two SIMs. Put a KeyPad Plus at the main entrance so staff use cards instead of shared codes, dual-tech detectors in air-conditioned areas, and door contacts on server rooms and stores. On larger floors, a range extender such as the Ajax ReX Jeweller (₹15,936) or Dahua ARA43-W2 (₹8,213) carries the signal further. If the office already has wired sensors, the Dahua ARC3808H hybrid panel lets you keep them and add wireless detectors alongside.
Practical buying tips
- Count every opening and room before you buy. Detectors and sirens add up quickly, so budget for them, not just the hub.
- Most detectors run on CR123A or coin cells. Keep spares and check battery status in the app.
- Mount motion detectors at the height the datasheet specifies, usually around 2.2 to 2.4 m, and away from direct sunlight.
- Put the hub somewhere central and out of sight, near the router and with good mobile signal.
- If you also want to secure the door itself, read our smart door lock buying guide.
Where to buy
Start with the hubs and panels category, pick the matching detectors and sirens, and check each product page for full specifications. For multi-site rollouts, larger offices or bulk orders, send us your detector list through the request a quote page and we will price the complete bill of materials.