Increase/Decrease the Volume
1.Press once, or Press and Hold the “Volume Up” button “+”, or “Volume Down” button
Saving a Radio Station
You can save your 20 favorite Radio stations from CH 01 to CH 20 in the T.sonic™ 840’s memory.
1.Select the Radio station (FM frequency) that you wish to save.
2.Press the 
to enter the Preset FM Channel.
3.Push the “Menu Switch” down (Next) 
or up (Previous) 
to select a channel number
and press the 
to save the selected station to it.
Recall a Saved Station
1. In the RADIO Mode press the 
to enter the Preset FM Channel.