Check the listing for details. 2 in 4 Out Speaker Selector Switch Box 4 Zone Amplifier & Speaker Selector O1Z2. Color: Black, Condition: New. Listed at 73.97 USD. This is a non-powered volume controlling splitter for your sound system. It enables you to run 2 amps with speaker selection, easy to hook up with banana plug connections, and each channel can support up to 300W! Features: Supports two power amplifier inputs, four speaker outputs.(4 sets of speakers can be turned on or off independently). Four sets of stereo speakers can sound at the same time, or one or more sets of speakers can be turned off separately, manually select a push-button switch. Offers banana plug connections, and each channel supports power up to 300W. Provides 6.5mm earphone output with adjustable volume knob. Signal input provides no-load protection of vacuum tube power amplifier signal. The switching signal is stable, and there will be no additional interference or noise between channels. Compact design, strong metal case, easy to install, no external power supply required. Note: *Compatible with all types of power amplifiers and speakers. *The input/output receives heavy speaker wire or speaker pin wire through the terminal port. *Connect the power amplifier to the position of amplifier A or Amplifier B. *Connect the loudspeakers to the 1-2-3-4 loudspeaker respectively. *Turn on your power amplifier stereo, the product does not require external power. Specifications: Brand: LYNEPAUAIO Material: Metal Color: Black Earphone Listening Interface: 6.5mm Input: 2 sets of input (banana plug) Output: 4 sets of output (banana plug) Power: Maximum support 300W Frequency Response: 10Hz - 50KHz Item Size: 24*11.3*5.5cm / 9.44*4.44*2.16in Item Weight: 860g / 30.33oz Package Size: 26*18.5*6.5cm / 10.23*7.28*2.55in Package Weight: 960g / 33.96oz Packing List: I7938 1 * Speaker Selector