This is a bidirectional speaker switcher that allows users to connect 6 pairs of speakers to a single stereo receiver or amplifier or to connect 6 amplifiers/receivers to a single speaker pair, making it convenient and flexible to use. Features: 6 pair single source design speaker selector supports bidirectional connection, which allows 6 pairs of speakers to be connected to an amplifier or vice versa. The device has a convenient pushtype terminals on rear that can connect up to 12 AWG speaker wires.? Overload protection circuit allows up to 6 pairs of speakers to be connected without damaging the amplifier and protect the rest speakers or amplifiers that aren"t selected. Manual switch buttons on the front panel. Independent left/right channel grounding path is compatible with all stereo amplifiers. Supports up to 100 watts of amplifier power and 4 to 16 ohms of all types of speakers. Heavyduty steel housing, durable and reliable, no external power supply required. Note: this speaker switcher does not support multiple speaker pairs to be selected simultaneously. Only one pair of outputs can be selected at a time.? Specifications: Brand: LINEPAUDIO Material: Metal Color: Black Rated power: 100 watts per channel Frequency response: 10 Hz to 50 kHz. Item Size: 24*9.3*4.2cm / 9.44 * 3.66 * 1.65in Item Weight: 660g / 23.28oz Package Weight: 810g / 28.57oz Package Size: 26*18.5*6.5cm / 10.23 * 7.28 * 2.55in Packing List: 1 * Speaker Selector