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.