Specification:

Color: Black
turning elements? Chromonic, guitar, bass, violin, harp, wind
instrument Adjust Range: A0 (27.5Hz) – C8 (4186.0Hz)
A4 frequency: 435-440Hz
Power: 1 * CR2032 Battery (not included)
Display size: 1.6*2.8cm/0.6*1.1in
Product Weight: 21g / 0.74oz
Package Size: 5.4*1.8*11.9cm/2.1*0.7*4.7in
Pack Weight: 36g / 1.3oz