First Alert Dual-Sensor Smoke and Fire Alarm SA320AUS

Rubbish product – I bought a number of these smoke alarms when I moved into a new residence in 2016. They have a shared problem of failure. First you have the cheep, cheep, cheep indicating that the battery is going flat. After installing fresh batteries it does the same thing. I have tried the remedies suggested online without solution. The best solution is to bin it and buy another brand.