The CAVIUS Nano Home Starter Pack contains 2 x CAVIUS Nano 10 Year Photoelectric Smoke Alarms and 1 x CAVIUS Nano 10 Year Thermal Heat Alarm. The pack has been designed to cover the primary areas of the home. For best protection, smoke alarms should be fitted into every room of your home. CAVIUS recommends the kitchen as the primary location for the Thermal Heat Alarm.