The PROZOR 3.5mm & RCA Bi-Directional Stereo Audio Switch is designed to simplify your audio setup and give you precise control over your sound. This compact passive switcher supports 2-in-1-out and 1-in-2-out configurations, allowing you to connect two audio sources to one output device or one source to two outputs — all without constantly plugging and unplugging cables. Each channel features both 3.5mm AUX and RCA L/R interfaces, providing wide compatibility with PCs, laptops, smartphones, CD players, turntables, amplifiers, active speakers, and headphones. When one channel is selected, its 3.5mm and RCA ports output the same audio signal simultaneously, making it easy to use both an amplifier and headphones with the same sound source. The volume knob allows smooth level adjustment, and the dedicated mute button lets you instantly silence the output while keeping your settings intact. Its passive design requires no external power, ensuring pure, lossless, noise-free transmission. Built with a rugged all-metal shell, the unit offers excellent shielding, durability, and plug-and-play convenience—ideal for home, studio, or entertainment use. Warm Tips: When connecting low-impedance headphones and speakers at the same time, overall volume may slightly decrease or headphone sound may become lower. This is normal due to load sharing between devices. Only one output channel (1 or 2) works at a time. Channels cannot output simultaneously.