Korg HB1BK Metronome with Humidity/Temperature Detector, Black Portable, full-featured metronome provides enhanced rhythm training for every instrumentalist Built-in thermometer and humidity detector provide an easy way to monitor conditions in the case Beat-Counting display makes it easy to practice rhythms and phrasing Beat Mode offers from 0 to 9 Beats, plus 5 Patterns to practice any style of music Available in either Black (HB-1-BK) or White (HB-1-WH)