Features: 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. Specifications: Tuning Range: 12Hz-4186Hz Input: 1/4" Monaural Jack Output: 1/4" Monaural Jack Power Supply: DC 9V Power Adapter (negative inside and positive outside) Item Size: 9 * 4 * 3.5cm / 3.5 * 1.6 * 1.4in Item Weight: 218g / 7.7oz Package Weight: 300g / 10.6oz Package Size: 11 * 6.5 * 6cm / 4.3 * 2.6 * 2.4in Note: The power adapter is not included. Packing List: 1 * Tuner Pedal 1 * User Manual (English)