Features: for line selection of instruments, amps, cabinets (speaker cables required), and effects combination pedals. Full-featured line selection single block for line selection of instruments, amps, cabinets (speaker cables required), and effects combination pedals. The mode selector switch is designed so that separate A/B transmissions can be changed to simultaneous A&B transmissions. In both modes, the product supports forward and reverse bidirectional use, and the signal can be transmitted from the a and b connectors to the c connector, or from the c to the a and b connectors. It can be used when no power supply is needed (led light not be lit). All-metal housing. Compact and delicate appearance. Mechanical straight-through foot switch. Simple and clear operation. Two power supply interfaces can be used in a range. Material: Metal colour: black Package Contents: 1 x guitar effector Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.