Communication is via a single free mobile call or by sending a text message and each device can authorise up to 250 mobile users without a key fob or proximity card costs.
Nimans’ head of headset and handset sales, Philippa Parrish, said the company has recently added the product to its portfolio and is anticipating strong demand.
She commented: “Everyone carries a mobile phone so there is a massive market out there. A simple free call connects to the GSM Key which responds to a unique call ID which makes it both secure and reliable.
“The ingenious unit will also monitor burglar, fire and smoke alarms and send out a text if any are triggered, progressively calling up to eight people. It is a truly intelligent addition to any home or business. You can add or remove users instantly, simply, securely and cost free.”