Sennheiser IS 150 Instructions For Use Manual page 14

Advantages
With cordless sound transmission via a stethoset receiver, you can be
independent of cables. Only you can hear the television sound, and you
can decide the volume yourself without disturbing others!
According to present scientific knowledge, sound transmission by infra-
red light poses no risk to health whatsoever.
High reception reliability due to the carrier frequencies of 2.3 MHz and 2.8
MHz. Fluorescent tubes and digital controls do not use this frequency range.
Lightweight and extremely comfortable to wear - the receiver weighs
only 45 g, including the rechargeable accuplug.
Replaceable ear-cushions of silicone rubber which are kind to the skin.
Mains connection via plug-in mains unit. The transmitter thus remains
small and unobtrusive. If you take your system to a country with a
different mains voltage, all you need to do is purchase the suitable plug-
in mains unit.
Sennheiser technology and Sennheiser service
are future-oriented
Even after many years, you will still have unlimited pleasure from your
infra-red sound transmission system. You can buy replacements for wearing
parts such as ear-cushions and accuplugs for many years to come. And in
the unlikely event that any repairs should be necessary, Sennheiser Service
Departments worldwide give moderately priced, fast and competent repairs.
Environment and health
Devices powered by rechargeable accuplugs are kind to the environment.
This energy source can be recharged many times. Conventional batteries,
on the other hand, must be disposed of as special waste after they have been
used just once. Sennheiser uses environmentally friendly NiMh rechargeable
accuplugs which contain no heavy metals. If an accuplug should be defec-
tive, it is then recycled - the dealer who sold it to you will take it back and
will also supply you with a new, original Sennheiser accuplug. (Recycling
methods differ in different countries).
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