Flexible 2-Zone Control Connect one amplifier to two pairs of speakers (both can play at the same time), or connect two amplifiers to one pair of speakers and easily switch sources (WARNING: ONE switch ON only. Please select only ONE amplifier as the input source. ) ^^ Independent A/B Switches Dual push-button controls let you select Zone A, Zone B, or both. Quickly toggle between different speaker zones or amplifier inputs. ^^ Passive, No External Power Plug and play design with zero sound loss. No power supply required, just connect your speaker wires via spring clip terminals. ^^ High Power Handling Supports up to 150W RMS per channel, compatible with most 416 passive speakers, ensuring safe and stable performance. ^^ Reliable Long-Distance Use Handles speaker wire runs up to 164ft (50m) without audio degradation. Perfect for distributed audio in homes, offices, or commercial spaces. ^^ Durable Build with Anti-Slip Feet Solid metal housing in black finish with anti-slip rubber pads, ensuring stable placement on any surface.