Features: Smart direct input box with ultra low distortion, it quietly transfers the sound of guitar or bass directly to the audio system. With XLR balanced/ 1/4" unbalanced output, and supports 4 * 12" cabinet simulation and ground lift functions. Gain switch for boosting low level signal: -20dB/ 0dB/ +20dB. Micro size and full metal shell, portable and durable. With LED light for indicating the working status. Specifications: Material: Metal Signal Input: 1/4″Monaural Jack (impedance: 1M Ohms) Unbalanced Output: 1/4″Monaural Jack (impedance: 1k Ohms) Power Supply: DC 9V adapter (center minus plug)(not included) Working Current: 12mA Item Size: Approx. 3.5 * 9 * 3cm / 1.4 * 3.5 * 1.2in Item Weight: Approx. 135g / 4.8oz Package Size: 10.5 * 6 * 4.5cm / 4.1 * 2.4 * 1.8in Package Weight: 155g / 5.5oz Note: The power adapter is not included. Please use the power adapter whose polarity is positive pole outside and negative pole inside. Otherwise, the product may not work properly. Package List: 1 * Effect Pedal 1 * User Manual(English & Chinese)