Description: 8 Groups of stereo speakers can be selected and switched output by buttons (8 groups of speakers can be turned on or off individually), also they can be sounded at the same time, or one group of speakers or multiple groups of speakers can be turned off individually, and the button-type switch can be manually selected. Accepts up to 12 AWG speaker wire with convenient clip-on terminals. Signal input provides power amplifier signal no-load protection function. The input channels support power amplifiers up to 300 watts and all types of speakers from 4 to 16 ohms. The output of each channel manually selects the switch, plug and play, the switching signal is stable, and there will be no interference or noise between channels. Compact design, sturdy metal housing, easy to install, and the product does not require an external power supply. Specification: Model: B028 material: metal Color: Black Interface: Snap-in terminal block Power supply: No external power supply, plug and play Compatible with: All types of power amplifiers and speakers Input: 2 sets of input (terminals) Output: 8 groups of outputs (terminals) Power: Input channel Support 300W Frequency Response: 10Hz - 50KHz. Weight: 950g Connect the power amplifier to the A and B positions respectively. Connect the speakers to the 1-2-3-4-5-6-7-8 positions respectively. Size Chart: 335x95x45mm/13.19x3.74x1.77inch Package Includes: 1 Piece B028 Amplifier Speaker Switch Switcher Note: 1. Please allow slightly error due to manual measurement. 2. Due to the difference between different monitors, the picture may not reflect the actual color of the item. 3. Wish you a wonderful on-line shopping!