C&E FS20 Wireless transmitter unit FS20 S4UB 4-channel Max. range (open field) 50 m 57125 Fiche De Données

The ‘FS20 S4UB’ flush-mounted battery transmitter is operated using a high-performance
lithium battery that boasts an estimated battery life of up to 10 years. This means that you only
need to replace the battery very rarely.

To replace the battery you first need to remove the transparent shrink film that
encloses the ‘FS20 S4UB’. After successfully replacing the battery, you should
attach another comparable insulator.

Costs arising from the damage that may be caused far outweigh the costs of
getting the battery replaced!

It may be necessary to replace the battery, if you experience an increasing number of reception
problems on all channels, the causes of which are not listed in section 9.

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Check whether anything has changed. For example, the receiver may be
installed at a different location, metal objects may have been positioned near
the transmitter/receiver, a computer may have been set up and so on.

Constructional modifications (for instance, a steel door, the attachment of
metallised insulating plates or similar) can reduce the wireless range, for
example.

If you have investigated all the possible causes of the disturbance and the deterioration of the
reception quality or the ‘FS20 S4UB’ has already been operating for some years, then you
should replace the battery with a new one.