The JOYO JT 306 mini chromatic guitar tuner is a neat little device and we love it, it's an affordable clip on chromatic tuner that hides behind your guitar headstock, a little bit different to the other clip on tuners that stick out !
Simply clip this little tuner on and adjust the screen so only you can see whats going on.
A4 Frequency: 440Hz
Tuning Range: 0A(27.5Hz)-8C(4186.01Hz)
Power: CR2032 Battery (1)