T-22 Super thin Chromatic Tuner

A4 Fcenuency: 435~445Hz
Battery: 3V (CR2032 button cell battery 1 piece)

Tuning Item: chromatic

Tuning Range: E1(41.2Hz)~a3(1760Hz)
Keys: C, F, Bb, Eb
Consumption: ≤4mA
Half Note: #, b