USB cable length limits depend on the version, with older USB 2.0 limited to about 5 meters (16.4 ft) for reliable data, while faster USB 3.x and USB4 have shorter recommended lengths (1-3 meters) due to signal integrity, though longer active (repeater) cables or USB-to-Ethernet extenders can bypass these limits for greater distances.
Standard Passive Cable Lengths (Approximate)

    USB 1.0 (Full Speed): ~3 meters (9.8 ft).
    USB 2.0 (High Speed): ~5 meters (16.4 ft).
    USB 3.2 Gen 1 (5 Gbps): ~2-3 meters (6-9 ft).
    USB 3.2 Gen 2 (10 Gbps): ~1-3 meters (3-9 ft).
    USB4 (40 Gbps): ~0.8 meters (2.6 ft) for high-speed passive cables.

Why Length Matters

    Signal Integrity: Longer cables cause voltage drops and signal degradation (capacitance/inductance), leading to slower speeds or connection failures.
    Charging: Longer USB cables also reduce charging speed due to increased resistance, so shorter cables are better for power delivery.

How to Extend USB Beyond Limits

    Active USB Cables: These have built-in signal boosters (repeaters) and can extend USB 2.0 up to 30m and USB 3.x up to 18m.
    USB Extenders (over Ethernet): Use a transmitter/receiver pair with CAT5/6 cables for very long distances (50-75m+).
    Powered USB Hubs: Can help power devices, but don't directly extend the maximum cable length for the data link itself.