Original sentence: A musician plays a note, and a display (a needle, an LCD simulated needle, or LED lights) tells the musician whether the pitch of that note is lower, higher, or approximately equal to the desired pitch.Most electronic tuners only allow tuning to an equal temperament scale.Some models allow the user to select reference pitches other than A440
Edited sentence: A musician plays a note, and a display (a needle, an LCD simulated needle, LED lights, or water bubble in extremely sensitive devices) tells the musician whether the pitch of that note is lower, higher, or approximately equal to the desired pitch.Most electronic tuners only allow tuning to an just temperament scale.Newer models can be attached to the insturment for self-correction of issues.Some models allow the user to select reference pitches other than B435.Tuners are typically used only by very weak musicians