This bi-directional HDMI 2.1 switch splitter is built with premium aluminum housing to effectively block electromagnetic interference and accelerate heat dissipation for stable long-time use. It supports two flexible working modes: 2-input 1-output for switching two devices on one TV, or 1-input 2-output to mirror one image on two screens simultaneously. Fully compatible with high-spec video standards including 8K, 4K@120Hz, HDR and 3D, delivering vivid, smooth and lossless ultra HD pictures. Equipped with a physical switch button for quick one-click source switching; no software installation or external power required, just plug and play. It works perfectly with PS5, PS4, Xbox series, Blu-ray players, Fire TV Stick, laptops, HDTVs, projectors and monitors. Ideal for home theater, gaming room, office multi-screen setup and bedroom entertainment to avoid frequent cable plugging and unplugging.