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 Switcher Material: Aluminium Alloy Volume: Approx. 280 x 130 x 90mm / 11.0 x 5.1 x 3.5in Remote Control Battery Specification: 2 x AAA Battery (not included) Speaker Load Power <500W Switching Mode: Button Switching and Remote Control Switching Features: 2 Power Amplifier 4 Speaker or 4 Power Amplifier 2 speaker Two Ways of Use 1 x Dual Channel Speaker Switcher 1 x Remote Control 1 x User Manual 1 x Power Cable