GUITARX X9 - Guitar Tuner Pedal Mini - Chromatic with Pitch Calibration - Also for Bass - Flat Tuning (Power Supply Required) Built to last: Strong and resistant for beginners and professionals on the road Clear display: Large and simple display with the perfect visibility with no confusing information, you only see what you need to see Noise no more: It mutes the input signal when its being used, and routes the signal straight to the output when not in use & forget annoying noise Fast & 100% accurate: Be ready in a few seconds with fast tuning with the most advanced precision in the market The color display is large, clear, and has excellent visibility under any lighting, also this pedal has you covered while playing at home or outdoors Tuning accuracy: +/-0.5 cent. Tuning range: A0-c8 (great range for electric instruments). Pitch calibration: 430-450 hz. Drop or flat tunings up to 4 semitones below standard pitch. Clear and simple display with the perfect visibility. It mutes the signal when it&#039;s being used. No more noise before, after and while tuning your instrument. Built to last, it&#039;s made strong for professionals on the road. Rugged metal chassis for ultimate durability. Dimensions: 3.7 x 1.2 x 1.5 inches, 4.3 ounces.