The HP 776620-001 TPN-DA03 Smart AC adapter powers compatible equipment from an AC outlet. Its 150 W rating and stated output of 19.5 V, 7.7 A identify the electrical supply it provides and help when choosing a replacement with matching specifications.
It connects through a blue-tip 4.5 × 3.0 mm barrel plug. Check that the equipment is designed for this connector and supports the stated output. The listing describes this as an original HP adapter.
Use it as an external power supply for compatible equipment at a workspace, or as a replacement for an adapter with the same specifications. The listing does not specify whether an AC cord or other accessories are included.