Feature 1[Both Button and Remote Control]: The dual channel speaker switcher is simple and convenient to use, can be used by both button and remote control, with one on and off button, 6 buttons correspond to 6 lines. 2[Dual Purpose]: The amplifier speaker switcher has two uses, one is 2 in 4 out switching (2 amplifiers 4 sets of speakers), and the other is 4 in 2 out switching (4 amplifiers 2 sets of speakers). 3[Smoothly Switching]: The speaker switcher selector can switching smoothly, seamless, and no noise, with fevered sound linear power supply, ensuring clean and reliable sound. 4[7 Button Control Panel]: The dual channel speaker switcher has 7 button control panel corresponding to the 7 button remote control, and one press can control which line is the amplifier and which line is the speaker. 5[Bipolar Separation Circuit]: The amplifier speaker switcher has special design, with bipolar separation circuit, and both positive and negative poles are controlled by relays.Item Type: Dual Channel Speaker SwitcherMaterial: Aluminium AlloyVolume: Approx. 280 x 130 x 90mm / 11.0 x 5.1 x 3.5inVoltage: 100-240VRemote Control Battery Specification: 2 x AAA Battery (not included)Speaker Load Power <500WSwitching Mode: Button Switching and Remote Control SwitchingFeatures: 2 Power Amplifier 4 Speaker or 4 Power Amplifier 2 speaker Two Ways of Use .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x Dual ChannelSpeakerSwitcher1 x Remote Control1 x User Manual1 x Power CableNotePlease note that the power amplifier cannot be unloaded due to its output, therefore is not recommended to use this product when unloaded.