Korg tuner CA-2

KORGs CA-2 tuner offers the most basic functions of a tuner. It detects the tone sounding or it plays a reference tone. The tuner is simple to use and detects tones in the range of A0 to C8, which makes it siutable for most musical instruments. If You like, You can change the calibration range from (A4=) 410Hz to 480Hz. 
Scale: 12 note 
Detection range: A0 (27.50Hz) - C8 (4186.01Hz)*
Reference tone: C4 (261.63Hz) - C5 (523.25Hz) 
Calibration range: A4 = 410Hz - 480Hz
Power supply: 2 AAA batteries 3V (included)
Battery life: ca. 200 hours with alkaline batteries
Dimensions: 100 X 60 X 16 mm
Input: 1/4” monaural phone jack