ammoon Precision Chromatic Tuner Pedal Large LED Display Full Metal Shell with True Bypass for Guitar Bass With large and bright LED display, easy to observe tuning status. True bypass footswitch for turning on/off the tuner pedal. Wide frequency design and high precision, can be accurate to ±1 point. Full metal shell and compact size design, durable and portable. Chromatic tuner pedal designed for guitar, bass and most musical instrument tuning. Note: The adapter is not included. Specifications: Item Weight: 215g / 7.6oz Item Size: 9 * 4 * 3.5cm / 3.5 * 1.6 * 1.4in Output: 1/4 inch monaural jack Supply: 9V Adapter (negative inside and positive outside) Tuning : 12Hz-4186Hz Input: 1/4 inch monaural jack Package Weight: 290g / 10.2oz Package Size: 11 * 6.5 * 6cm / 4.3 * 2.6 * 2.4in Package List: 1 * User Manual(English & French & German & Italian & Spanish & Japanese) 1 * Tuner Pedal