First Alert SMI105-AC Smoke Alarm

No. This unit features a sealed 10-year lithium battery backup, so you do not need to replace the batteries for the entire lifespan of the alarm.

It means that if you install multiple compatible units throughout your home, they are linked together. If one alarm detects smoke and sounds, every other connected alarm in the house will sound simultaneously, providing an early warning regardless of where the fire starts.

Ionization sensors are specifically designed to detect fast-flaming fires, such as those caused by paper or grease, more quickly than other types of sensors. This makes them an excellent choice for general areas like kitchens or living rooms.

This model includes a latching alarm indicator. The LED on the unit that first detected the smoke will flash differently than the others, allowing you to quickly identify the source of the alarm.

This unit is designed to be compatible with other hardwired First Alert and BRK interconnectable alarms. However, you should always check your existing unit's manual to ensure they share the same wiring and signaling protocols.

There is a single, convenient one-touch button on the face of the unit. Pressing it tests the alarm's functionality, and pressing it during an alarm event will silence the unit.