To tune a guitar, it is correct. Its accuracy is good using the input jack for an acoustic guitar he is doing not too bad ... The pitch is adjustable which is essential when playing in groups with a non-adjustable type accordion ...
The metronome function is pretty useless as soon as the sound is ...
Big flaw in my model: the display is almost out of order, it has about 3 years!
Quality / price ratio still nice for an extra tuner ...