The GSM-1000 works on latest GSM technology. All you need is to insert a valid SIM card and program phone numbers of all users through simple SMS text commands. When an authorised user makes a call to the receiver, it rejects the call after a single ring and activates a relay. Since the call is rejected, the user is not charged for the call.

The GSM-1000 works on GSM network therefore the receiver can be activated from anywhere in the country where GSM network is available. For example you can open your gate or switch on your kitchen lights in Sydney from Melbourne by making a call from your mobile phone and without getting charged. It is portable and as simple as making a call.