Silvercrest SFS 16 C3 - Battery Status Indicator

SFS 16 C3
■ 14
│
GB
│
IE
│
NI
│
CY
Fig. 1 Fig. 2
Battery change display
When you press the ringer button it lights up red
briefly. If the ringer button  does not light up red when
pressed, the battery is dead. Replace the used battery
with a new one of the same type.