Two PCs, one keyboard, one mouse, one scanner. You're unplugging and replugging all day just to move between them. The US4224-AT is a 2-port, 4-device USB sharing switch that ends the cable juggling. One button press and your peripherals flip to the other machine. ATEN InstaSync keeps the handoff smooth — no dropped connections, no re-pairing. Four USB devices share across both systems at up to 480 Mbps. It's hot-pluggable, so you can add or remove a peripheral mid-session without powering anything down. No drivers, no software. Works with Windows, macOS, and Linux. Small enough to disappear on your desk, with a little accent light so you know which host is active