Mini Chromatic Tuner Pedal Effect LED Display True Bypass for Guitar Bass Type 1: 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 Range: 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) Type 2 Features: The ABY is applicable for the instrument, amplifier, speaker(be sure to use speaker cable) and pedalboard. The design of mode-choosing switch, which enable A, B channels transfer from respectively to simultaneously. In both the two modes, ABY can be used in both positive and negative directions, the signal path can flow from A/B to C, or from C to A/B. ABY can work without power supply (LED will not light up). Full metal shell, sturdy construction with good hand feeling. Very small and compact design takes up little space on the pedalboard. True bypass switch design minimizes tone loss. Specifications: Material: Metal A/B/C Jack: Standard 1/4" Jack-MONO/TS Power Supply 1: DC9V300mA Power Supply 2: USB5V300mA Item Size: 90 * 48.5 * 42mm / 3.54 * 1.91 * 1.65in Item Weight: 178g / 6.29oz Package Weight: 155g / 5.48oz Package Size: 10.5 * 5.5 * 4.5cm / 4.13 * 2.17 * 1.77in Package List: 1 * ABY Channel Switch 1 * Manual (English) Type 1 : Type 2: