Toronto Music Pro
Tuner/Metronome/Tone Generator, 3 in 1 for ANY INSTRUMENT三合一，通用调音器
Electronic Tuner/Metronome/Tone Generator 3 in 1
Chromatic tuner, suitable for ANY INSTRUMENT - guzheng, yangqin, guitar, violin, cello, wind, and even most part of piano (except for piano's very high notes and very low notes)
High quality - very sensitive and accurate.
AAA Battery (x2) operated, included. Long battery life