Specifications: Function:Tuner,Metronome,Tone Generator. Tuner: Tuning Mode:Auto,Manual. Tuning range: 12 note equal-tempered. 0A - 7C. Calibration range:430Hz-450Hz. A4 Frequency range:440Hz High-precision LCD needle-type meter for stable tuning. Wide LCD Screen Display. Turning method:choose built-in microphone or plug into a pickup. Turning mode:G(Guitar),B(Bass),C(Chromatic). Detection Accuracy:±3 cents. Items of turning:Chromatic,Guitar,Bass,Violin,Ukulele and other compatible with twelve-tone equal temperament scale music instruments except piano and violoncello. Metronome: Beat type:0ï½?. Built-in 7 different rhythms include duplets, triplets, triplets with inner beats omitted, quadruplets, and quadruplets with inner beats omitted. Tempo range:30-280(bpm) Volume adjustable. Tone Generator: Falling tone option:“bâ€?“bbâ€? Tone range:3C-7B. Automatically power off if no signal is received in 3 minutes. Power supply:2 x AAA batteries. Dimensions:106x61x15mm. Colour:black Package included: 1 x Guitar Tuner 2 x AAA batteries 1 x pickup 1 x User Manual