6
Noting the serial number
Both serial number and performance
level are printed on the housing
and
on
the frame.
■
When you change the housing:
□
Do not re‑use the old housing with
imprinted serial number.
□
Note down the serial number in the customer's user
guide, on the last page. This way you don't have to
remove the housing to read the serial number.
■
When a hearing instrument is returned from our
service:
If you receive a hearing instrument without serial
number on the housing, remove the housing and
double‑check the serial number on the frame. The
hearing instrument may have a new serial number.
Note this new number down in the customer's user
guide, on the last page.
