The base unit can be placed on any horizontal
surface or mounted on a wall.
Make sure when placing on a horizontal surface
that it is smooth, solid and level.
When mounting on a wall
Use only screws suitable for the wall material.
Make sure that the head of the screws fits in the
slot at the back of the charger unit.
Use the drill pattern (back cover) for appropriate
spacing. The screws should be positioned at a
distance of 42 mm (1 21/32”).
Use of excessive force when
placing the base unit on the
screws might cause damage.
The headphones can be placed
on the transparent hook that
comes with Comfort Duett.
Place the hook in the space
on the charger unit in the
direction seen in the picture.
4
NOTE:
A battery must be installed and charged
for Comfort Duett to operate. Your Comfort Duett
comes factory installed with a charged battery.
Charging battery
A rechargeable NiMH battery is included and
installed in the Comfort Duett. The battery is
charged whenever Comfort Duett is placed in the
base unit. A green LED on the base indicates when
the Comfort Duett is properly charging.
The Comfort Duett automatically shuts off when
placed in the base unit, unless it is connected to an
external source like TV or telephone and in use.
Low battery
The green LED is lit when Comfort Duett is used
in MIC mode and the orange LED is lit in T mode.
When the battery level is low the LED indicating the
current mode starts to flash.
Charge time
Typical charge time for the battery is about 1 hour
per 1 hour of usage or about 14 hours from empty.
A fully charged battery lasts 15-20 hours depending
on volume output. It is normal for the Comfort Duett
to warm up while charging.
Battery lifetime is about 3-5 years with normal
usage.
Replacing the battery
Slide the battery cover to the side and remove
the old battery. Place the new battery in the
same position as the old. Please notice how the
positive and negative ends of the battery should be
positioned.
The battery should be positioned with the positive
end towards the bottom of Comfort Duett.
NOTE: Never place Comfort Duett in
the base unit unless using a NiMH
rechargeable battery with a charge
rate of at least 85 mA.
Maximum volume control
Comfort Duett is equipped with a control that limits
the amplification level. Too high amplification
level increases the risk of an unpleasant acoustic
feedback, plus damage to the ear drum. The
maximum volume control is placed on the back of
Comfort Duett, as seen in the picture. The control is
adjusted with a 2 mm screwdriver. The level used,
1-9, is shown in the small, square display window.
Level 1 is the lowest amplification level with level
9 is the highest, giving an amplification boost of 60
dB. The factory default level is pre-set to level 2.
Maximum
volume
control
Bass reduction
Default bass level
Bass reduction
control
Using a neck loop
Appropriate maximum amplification level when
using a neck loop is 1-6. If a max level 6 is too weak,
adjust the T-level on the hearing aid.
Warning: Do not adjust the maximum volume
control to a higher level than needed when the
volume control is in its maximum level!
If the maximum volume control is incorrectly
adjusted the maximum volume might be harmful!
Bass control
The bass level can be adjusted with the bass
reduction control. The control is the red switch
found when you remove the battery cover. If you
prefer less bass, the small red switch should be
moved towards the top of Comfort Duett (with a pen,
paper clip or small screw-driver).
This adjustment also adjusts the sound from
external sources connected to Comfort Duett.
5
Charging and replacing the battery
Setting up the Comfort Duett
Required battery specification
Note that a replacement rechargeable battery must
be a NIMH with a charge rate of at least 85 mA.
Standard non-rechargeable alkaline batteries can
be used in Comfort Duett as an exception. However,
this is not recommended as the alkaline battery
may
leak corrosive electrolyte or explode
if placed
in the base charger unit.
Setting maximum volume control and bass reduction
Note: Setting and adjusting hearing
instruments is best performed by
your hearing care professional.
This is especially true when your Comfort Duett
is used with Hearing Aids.
