Meisel 5 in 1 Digital Metro Tuner+ Thermo-Hygro Meter, IMT-301. Tremendous piece! It contains: A digital Metronome, auto chromatic tuner, digital guitar tuner, thermometer-hygrometer, and a reference pitch generator. Has an LCD display. The metronome has three different tones for the strong beat (chime), weak beat (drum) and rhythm (wood block). Has a volume control, continuously adjustable by a knob from max to mute. Has a built-in mike for acoustic and a jack for electric instruments. Also has an earphone jack.  Measures temperature. Measures humidity 20% to 90%.     The size of unit is approximately 5.75" tall, 2.5" wide, 3/4" thick. Comes with a light carrying pouch and full instructions.        Made in Korea.  You will never find another one like this!