As a chromatic tuner, the CM40 offers a variety of impressive features, including two modes of tuning: Tone (manual) and Tuner (automatic). When using Tuner mode, the tuner automatically recognizes the note you’re playing, while Tone mode allows you to select a reference pitch. Use its on-board microphone to adjust acoustic instruments and its 1/4-inch input connector for electronic instruments. No matter what mode you use, the CM40 allows a wide range of calibration from A 430 to 450Hz, while its smooth, real-time display provides precise and accurate tuning. It also features a transposition setting that allows you to easily tune down your instrument. The CM40 also functions as a metronome. Practice along with tempos ranging from 30 to 250 bpm using the tuner’s built-in speaker with volume control and 1/8-inch headphone jack. Designed with a large, full color LCD display, as well as LED pitch/beat indicators, the CM40 can be easily used in any environment, including a dark stage.