Rayzm Gitarren-Tuner, Clip-on Stimmgerät für Chromatik/Gitarre/Bass/Ukulele/Violine,
Flat tuning available for guitar, bass. It maintains a low defective rate of less than 0.1%, much far above the industry standard. If not, pls keep on loosing/tightening your string until the correct one shows on the screen.