Features: Chromatic tuner pedal designed for guitar, bass and most musical instrument tuning. Wide frequency design and high precision, can be accurate to 1 point. With large and bright LED display, easy to observe tuning status. True bypass footswitch for turning on/off the tuner pedal. Full metal shell and compact size design, durable and portable. Specifications: Tuning Range: 12Hz-4186Hz Input: 1/4 inch monaural jack Output: 1/4 inch 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: 215g / 7.6oz Package Size: 11 * 6.5 * 6cm / 4.3 * 2.6 * 2.4in Package Weight: 290g / 10.2oz Note: The power adapter is not included. Package List: 1 * Tuner Pedal 1 * User Manual(English & French & German & Italian & Spanish & Japanese)