The Intellitouch CT1 Capo Tuner combines vibration-based tuning with a single-action capo. It is automatic, chromatic, and displays the measured pitch on a large, backlit display for easy tuning. Designed to tune 6 and 12 string, electric and acoustic guitars without interference from background noise, the CT1 feels the instrument"s vibration instead of sound. Clips on Arrow display Multicolor backlight Strong capo clamp A-Ref adjustment 430Hz-450Hz Lifetime Warranty