Features: Chromatic tuner pedal for electric acoustic guitar and bass. True bypass circuitry allows the signal going straight from the IN to the OUT. Bright LED display for reading the tuning information easily. Mini size and metal case very durable and easy to store. Specifications: Material: Metal Tuning : 12Hz-4186Hz(C8) Input: 1/4 Monaural Jack (Impedance: 470 Ohms) Output: 1/4 Monaural Jack (Impedance: 100 Ohms) Display: LED Screen Power Supply: DC 9V Item Size: 9.5 * 4 * 5cm / 3.7 * 1.6 * 2in Item Weight: 180g / 6.4oz Package Size: 12 * 6.3 * 6.5cm / 4.7 * 2.5 * 2.6in Package Weight: 255g / 9oz Note: The power adapter is not included. Package List: 1 * Tuner Pedal 1 * User Manual (English & Chinese)