All-in-one functionality in a compact case measuring only 4" x 2 3/8" x 5/8". Tuning range from C1 to B7, with A calibration from 430 - 450 Hz. Includes a reference pitch generator with a range of 4C - 4B, needle style LCD panel and a full function metronome. 1 year warranty. 1/4" jack so you can connect directly to your electric instrument for tuning!