Panasonic KX-TG2570F Operating Instructions Manual page 3

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Battery Charge
A rechargeable Nickel-Metal
Hydride (Ni-MH) battery powers
the handset. Charge the battery
for about 7 hours before initial
use (p. 12).
Base Unit Location/Noise
Calls are transmitted between the base unit and the handset using wireless
radio waves. For maximum distance and noise-free operation, the
recommended base unit location is:
Away from electrical appliances such In a HIGH and CENTRAL location
as a TV, personal computer or another with no obstructions such as walls
cordless phone.
as.
Note:
While using the handset:
-- ff you are near a microwave oven which is being used, noise may be
heard from the receiver. Move away from the microwave oven and
closer to the base unit.
-- If more than one cordless phone is being used and your handset is near
another cordless phone's base unit, noise may be heard. Move away
from the other cordless phone's base unit and closer to your base unit.