The Intelli 5-in-1 Digital Metro Tuner and Thermo Hygrometer has all the features you need in one compact unit. The digital metronome which has 7 different beat settings, 5 rhythm settings and a range from 40 to 216 BPM. The digital Chromatic with a built in mic, and pitch shift calibration from A 430 to A449. A Digital Guitar tuner. The thermo-hygrometer has a temperature range from 14F to 140F, a humidity range from 20% to 90%, celsius or farenheit settings. The reference pitch generator with a chromatic scale range of 88 pitches, pitch shift and continuously adjustable volume control. LCD display, rolling setting dial and volume control. 9V battery included.