Beacon signal strength
Beacons use Bluetooth Low Energy (BLE) transmission, and the signal travels around 10 meters (~33 feet) in ideal conditions.
Any sort of obstruction, including the human body, reduces signal strength and therefore limits the range. The illustration below gives you a general idea of obstruction potential for different materials.
A single beacon in a multi-room apartment is not enough. The signal is lost in the areas furthest away, resulting in potential false alarms about the assistee's whereabouts.
We recommend installing a beacon in all the main areas of a living space - such as the bedroom, eating area, lounge, and so forth - to ensure the home area coverage reaches all the places an assistee might visit during the day.