This is a built-in feature of our pre-2019 Micro Tuners, which is meant to notify players that the tuner is in Idle Mode, awaiting a vibrating signal from the instrument. Make sure your tuner is fastened securely on the headstock/body of your instrument and play one note at a time to allow your tuner to receive the note’s vibration. Once the vibration decays, the tuner will resume flashing to notify you that the tuner is still on.
NOTE: This feature cannot be deactivated and only pertains to the pre-2019 Micro Tuner models that contain the metronome and green-red LCD screen.