The bracelet is charged from a special charger. The main unit is removable and easy to insert into the charging compartment. These watches can hold a charge for up to 72 hours. When the charge becomes close to the minimum, they emit a special signal. If the elderly person does not charge it after the signal, then the watch can work offline for about the same time, transmitting the pulse to another bracelet, but the display brightness decreases. The emergency button also continues to work. The unit can be charged from other devices.
It is a very nice finalised concept, very convenient as it still works if it is not charged. very cool