As an abbreviation of Input & Output, this radio has intuitive usability incorporated with alphabet « I » and « O » shape of Input part (volume control, channel select) and Output part (speaker). « IO’ helps you to experience new usability, not as controling buttons or wheels of normal radios.
Volume up _The radio is turned on the power supply and volumed up the sound if you turns the cone clockwise direction.
Tune the frequency _After you set the sound volume that you want, you can find favorite channels as controling frequency to move the cone to up and down.
Stick a bookmark _You can stick simple memos like interesting channel, feeling, favorite MC, and memorable ment.