Feature: 1. Applications: It is a selector for multiple sound sources in a home sound system for two channel HIFI stereo L/R devices, e.g., CDs, DVDs, radios, decoders, and other sound sources, as well as for switching between power amplifiers and active speakers, and between preamplifiers and postamplifiers. 2. Sound Switcher Selector: It is a selector (2 in 1 out), not a mixer, and cannot be input at the same time (AB cannot be input at the same time, only one channel can be selected for operating). 3. Usage: This 2 in 1 out sound switcher focuses on sound equipment, and it is best to avoid frequent plugging and unplugging the sound cable, making your sound system more professional. 4. Easy To Install And Use: Just turn the knob to select, easy to install. Pure switch box design, no amplifier function, no volume control, no power supply circuit, does not affect the sound quality. 5. Material And Process: Silver plated shielded cable, gold plated XLR terminals, CNC machined aluminum alloy housing, CNC machined solid metal knobs, brushed housing for durability. Specification: Item Type: 2 In 1 Out Sound Switch Material: Aluminum Alloy Connection: XLR 2 In 1 Out Interface: XLR. Package List: 1 x 2 In 1 Out Sound Switch1 x Instruction Manual