【One-Button Channel Switching】: The ABY Single Block Effect Pedal Line Selector Guitar Effect Pedal allows for easy and convenient channel switching with just one button. This feature makes it simple for musicians to switch between different sound effects, enhancing their performance and musical creativity. 【No Power Source Required】: This guitar effect pedal does not require a power source to operate. This makes it an ideal choice for musicians on the go, as it eliminates the need for carrying around extra power cords or worrying about finding an outlet. 【Two-Way Transmission】: The ABY Single Block Effect Pedal Line Selector Guitar Effect Pedal supports two-way transmission, allowing for a more versatile and dynamic sound. This feature enables musicians to experiment with a wider range of sound effects, adding depth and complexity to their music. 【Durable, Anti-Slip Metal Shell】: This guitar effect pedal is housed in a durable metal shell that is also anti-slip, ensuring that it stays in place during performances. Its compact and portable design makes it easy to carry around, making it a great choice for musicians who frequently travel for gigs. 【Supports A/B and A+B Modes】: The ABY Single Block Effect Pedal Line Selector Guitar Effect Pedal supports both A/B and A+B modes, providing musicians with more options for sound manipulation. This feature allows musicians to seamlessly switch between different sound effects, adding variety and interest to their performances. Specifications: Input Power: DC 9V ≥ 300mA A/B/Y Jack: 1/4 "mono audio jack Color: Black Item Size: 8.8 * 4 * 2.5cm/3.5 * 1.6 * 1 inch Item Weight: 146g/5.1oz Note: Due to the different display screen and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Packing List: 1 x Electric Guitar Effect Pedal 1 x Instructions