HP Thunderbolt Dock 120W G4 4J0A2AA USB-C Port Replicator

The HP Thunderbolt Dock 120W G4 (4J0A2AA) is an enterprise-focused docking station designed to replace a desk full of cables with a single Thunderbolt 4 connection. The rear panel hosts two DisplayPort 1.4 outputs, one HDMI 2.0 output, two USB 3.2 Gen 1 Type-A ports with charging capability, one USB-C DisplayPort Alt Mode port, a Gigabit Ethernet jack, and the Thunderbolt 4 upstream port that connects to the laptop. The front panel adds one USB-C port with USB 3.2 Gen 2 speeds for fast data transfer and peripheral charging, while two additional USB 3.2 Gen 1 ports on the side provide convenient access for flash drives and accessories.

Power delivery is a key feature: the dock supplies up to 100W to the connected laptop through the Thunderbolt cable, which is sufficient for most business ultrabooks and many mobile workstations. HP Sure Start — a firmware-level self-healing security feature — distinguishes this dock from consumer alternatives by protecting against firmware tampering and corruption, a consideration that matters in managed IT environments. The dock's physical footprint is remarkably small at 98 x 98 x 68mm, making it easy to tuck behind a monitor or mount under a desk. Compatibility extends beyond HP hardware to Apple, Dell, and Lenovo notebooks with USB-C power ports, though Thunderbolt 4 is needed on the host side to unlock the full feature set including dual display output and maximum data throughput.