Description
Mobeye CM4100 + Ei428RF Kit for Smoke/Heat Detection Network
A wireless interconnection network allows multiple battery-powered smoke and heat detectors to communicate with each other. This creates a fully radio interlinked fire detection system. Instead of operating as standalone units, the alarms are linked together. When one detector identifies smoke, heat or fire, every connected alarm sounds simultaneously. This gives early warning throughout the entire building, not just in the room where the incident starts.
The Mobeye 4G fire communication kit for Ei Electronics detectors delivers this wireless interconnection. It requires no landline or broadband connection. Fit the Ei428RF module to one detector, then connect it to the supplied Mobeye CM4100 using the included mounting and wiring accessories. Every interlinked detector then sounds simultaneously the moment smoke or heat is detected.
The system sends alerts straight to your phone via the iOS or Android app. It also alerts by phone call, SMS and email. This ensures critical fire alarm messages reach you without delay. Alarm signals can also be forwarded to a private Alarm Receiving Centre (ARC) for 24/7 professional fire alarm monitoring. Following a confirmed alarm activation, the ARC can follow agreed escalation procedures. It can send keyholder notifications or initiate emergency response protocols in line with your site requirements.
How It Works: Mobeye CM4100 + Ei428RF

Multiple battery-powered, radio interlinked smoke and heat detectors report alarms through the system. The Ei428RF wireless relay module integrates directly into the Ei Electronics network. The Mobeye CM4100 alarm dialler connects to the relay and runs independently. It has its own power supply and backup batteries. As a GSM/4G dialler, it requires no landline or broadband. This keeps the system operating through power failures and network outages, with automatic power-loss notifications. The Ei428RF itself runs on 230V mains power and requires a standard power lead.
Contents
Mobeye supplies a complete fire alarm communication kit. It combines the Ei428RF and Mobeye CM4100, including all necessary cables. To complete the network, you’ll also need the required number of compatible Ei Electronics RF smoke alarms and heat alarms.
Recommended Ei Electronics Detectors
The recommended smoke detectors are the Ei650RF and Ei650iRF. The recommended heat detector is the Ei630RF.
This setup requires an external power source on site, though not at ceiling level.
Typical Applications
The Mobeye CM4100 + Ei428RF kit suits residential, commercial and small industrial applications. It’s recommended wherever dependable fire detection, landlord fire safety compliance and remote notification are essential, including:
- private homes and residential properties
- apartment buildings and multi-occupancy housing
- holiday lets, Airbnb properties and short-term rentals
- hotels, guesthouses and bed and breakfasts
- offices and commercial workplaces
- retail shops and small shopping units
- schools and childcare facilities
- care homes and assisted living environments
- workshops and service garages
- warehouses and storage facilities
- agricultural buildings such as barns and stables
- light industrial or small manufacturing units














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