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 witha chromatic scale range of 88 pitches, pitch shift and continuously adjustable volume control. LCD display, rolling setting dial and volume control. 9V battery included.