Question about EQ-3 Starter set smoke detector

The manual says that the batteries last 10 years. Of course, this depends on how often the smoke detector sends out an alarm. The battery cannot be replaced. Therefore, the smoke detector must be replaced when the battery is empty.

Up to 40 smoke detectors can be networked. You can network them with the help of the instructions. Mount the smoke detector on the ceiling, connect the mobile phone app to the control panel and the smoke detector can be activated and assigned to a room.

The smoke detector has a test button to test the alarm and to check the communication with the other detectors.