BURY EasyTouch Pro - Manual (Page 28)

Operating guidelines
28
Setting the volume
Press down the vertical buttons to gradually increase (top buttons)
or decrease the sound (lower buttons) the sound during an active
conversation. A high signal tone sounds when the maximum volume
has been reached. A low signal tone sounds when the minimum
volume has been reached.
But you can also go over the buttons with your fingers (both
directions).
11. Other operating options
Connecting a telephone
At least one telephone is listed in the BURY EasyTouch Pro telephone
list. Automatic connection is on and the last connected telephone is
searched for three times, each attempt lasts 5 seconds. If this
telephone is not found, the next telephone in the list is searched for
(for 5 seconds). After this, the list is searched through entirely three
times before the automatic connection is interrupted. The device
then returns to standby mode. Eight telephones can be linked.
If a ninth telephone is linked, the last telephone in the list is deleted
(first in/first out). The last telephone connected is always in first
position on the list.