The Dell P975F is an AC power adapter for a laptop, supplying power from an outlet to a compatible computer through its DC output connector.
Rated at 65 W, it provides 19.5 V at 3.34 A. The barrel connector has a sensor center tip, so check that both the output specifications and plug type match the laptop.
It is suited to powering a laptop designed for these output values and this connector. Its rating and connector style help distinguish it from adapters with different power specifications or plugs.