Atag WU90211RM Notice D'utilisation page 132

Maintenance
Battery of the remote
NOTE!
When the batteries are replaced the pairing connection will remain.
Replace the batteries in time, as the receiving distance will be shortened if the voltage of the
battery is too low.
Don't forget to remove the batteries if you don't use the remote for a long time.
Don't leave the remote lying upside down on a conductive surface.
The warranty does not cover the batteries.
The battery may drain more quickly in connection with the lit icons.
Battery specifications: Two AAA batteries.
24