Chromatic tuner pedal for electric, acoustic guitar and bass. Innovative mini pedal tuner,small size. Bright LED display for reading the tuning information easily. Ture Bypass circuit design, no signal output in tuning state - Mute tuning. Easy to carry, superior shape. A fascination representative product among pedal tuner LED highlight screen, highlight display, clear and bright word Mute tuning mode, suppress the audio signal output. No any embarrassed weird voice 9V effect power supply is used to power the equipment Double stamp on the device, entering into adjustable A4 value range: 430-449HZ Aluminum alloy body, hard and firm Mute tuning LED screen Material: Aluminum alloy Adjustable A4 range value, approx. 430-449Hz Power Supply: DC 9V(not included) Colour:black Material:Aluminum alloy Size:41 x 41 x 43mm Package Contents: 1 x Pedal Tuner Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.