M-VAVE Precision Tuner Pedal LED Display With True Bypass For Chromatic Guitar Bass Effects Tuner pedal for chromatic, guitar and bass tuning. High precision, can be accurate to +/- 1 point. Large LED display for showing the tuning information. True bypass footswitch for turning on/off the pedal. Full metal shell and compact size design, durable and portable. Tuning Range: 12Hz-4186HzInput: 1/4 inch Monaural JackOutput: 1/4 inch Monaural JackPower Supply: DC 9V Power Adapter (negative inside and positive outside)Note:The power adapter is not included. Colour: greenMaterial: metalSize: 90.5x44.5x50.5mmPackage Contents:1 * Precision Tuner PedalOnly the above package content, other products are not included. Note: Light shooting 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.