■Feather
▶Users can program melodies and voices at will.
▶Various melody and voice output functions.
▶Melody output and AC power output control.
▶Internal system error diagnosis function upon initial power-on.
▶Built-in rechargeable battery for protecting programmed data in the
event of a power outage.
▶A protection function to prevent data loss due to improper
operation.
▶Melody playback time control function.