The C20 Tuner provides flexible calibration with 430Hz 449Hz reference frequency, meeting standard and orchestral tuning needs while maintaining digital accuracy. This versatile tuner supports various musical styles with consistent results. Featuring quick response technology under 10ms, this professional pedal tuner enables subtle adjustments during shows with reduced sound disruption. Built with strong machined aluminum alloy base showing 240MPa tensile strength, this compact tuner achieves excellent weight efficiency compared to conventional pedal materials. The robust construction ensures long term use. Designed with direct bypass circuitry, this premium tuner maintains complete indication integrity without tone modification or output decrease when inactive. The advanced circuit design protects your instrument's natural sound. This tuner works perfectly with both bass and guitar instruments, providing stable action across different frequencies for uniform outcomes.