Features: chromatic tuner pedal with durable metal case. Suitable for wide tuning. With LCD display easy to read tuning information. True bypass real signal no loss of tune. Specifications: Material: Metal Tuning : A0(27.5Hz)-C8(4186Hz) Precision: ±1cent Detection Method: Audio Signal Input Tuning Method: Auto Display: LCD Screen Supply: 9V Item Size: 9.5 * 4 * 5cm / 3.7 * 1.6 * 2in Item Weight: 150g / 5.3oz Package Size: 12 * 6.3 * 6.5cm / 4.7 * 2.5 * 2.6in Package Weight: 215g / 7.6oz Note: adapter is not included. Package List: 1 * Tuner Pedal 1 * User Manual (English)