Features: brand new and high quality Listen to power amplifiers A or B through a pair of speakers. A speaker 1 or 2 is heard from one of the two power amplifiers. Compatible with all types of power amplifiers and speakers. The input / output receives the heavy-duty speaker wire or speaker pin wire through the terminal port. Press the speaker selection switch to the corresponding speaker 1 or speaker 2 position. Press the amplifier selection switch to the corresponding amplifier A or amplifier 2 position. Turn on your stereo device, the product does not need external power supply. Fine steel housing, compact size suitable for any system. Specifications: Channel power: up to 200W per channel The frequency response: 10 Hz to 50 kHz Size: approx. 210x110x450mm/8.27x4.33x17.72in Package Includes: 1 x Amplifier Speaker Selector note: Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you!