Sennheiser RS 145 Comfort Instructions for Use - Page 18

Using the RS 145 comfort system Switching the headphones off ̈ Set the ON/OFF switch 5 on the headphones to the position OFF. The headphones switch off. Always store the headphones on the charging cradle 7 to ensure that they are fully charged when they are needed. Searching for a sound source ̈ Make sure that the operation indicator 8 on the transmitter is lit. If you do not hear the desired sound source, continue the search: ̈ Press the TUNE button 3 on the headphones until you have found your sound source.  ̈ If you cannot find your sound source, please read the following section. Changing the transmission channel If several transmitters are operated simultaneously and are very close to one another, the sound quality can deteriorate and you hear e.g. hissing noise. To improve the sound quality, change the transmission channel: 14