凑单佳品：历史低价， Korg 专业吉他贝斯调音器 $9.18，原价$22.00

Korg GA1 Guitar and Bass Tuner

Ultra-compact design
High-precision LCD needle-type meter for stable tuning
Quinta Flat Tuning mode lets you tune 1–5 semitones flat
Supports 7-string guitar tunings
Sound Out can produce a reference tone from the internal speaker