Features: Large, high-sensitivity LED display with descending function (can be lowered by 4 semitones). Two display modes: Normal and Strobe. Switch modes easily with the FLAT/DISP button. Advanced tuning feature with a pitch A4 frequency range of 435-445Hz, including 4-step flat tuning: b, bb, bbb, bbbb. Constructed from high-quality aluminum alloy, ensuring durability in a classic mini size. Anti-skid rubber pads on the backside enhance stability and prevent friction. Specifications: Type: TUNER Color: Black Tuning Mode: Chromatic Tuning Range: A0 (27.5Hz) ~ C8 (4186Hz) A4 Range: 435 ~ 445Hz Tuning Precision: ±1 cent Detection Method: Audio Signal Input Display Mode: LED Tuning Method: Auto Power: DC 9V adapter Item Size: 9.2 x 4.1 x 3.4 cm / 3.62 x 1.61 x 1.34 in Item Weight: 166g / 5.85oz Package Size: 10 x 6.5 x 6 cm / 3.94 x 2.56 x 2.36 in Package Weight: 197g / 6.95oz Package List: 1 mini pedal 1 user manual