The new and improved ST-8 with the added ability to tune to specific hertz (with accuracy of +/- 1/10th of 1hz) frequencies for astonishing accuracy. Super bright and clear "Hi-Def" display viewable from any angle. Faster processing and tracking speeds, courtesy of advanced chips. Tunes all instruments; fully chromatic. Easy to use and highly recommended for the musician that needs superior accuracy. Has tap tempo metronome.