The Dell C3MFM is a slim 240 W AC adapter for laptops, providing power to supported Dell systems. Its output is 19.5 V at 12.3 A, with an input rating of 100–240 V at 50–60 Hz.
A round barrel plug connects the adapter to the laptop. It has a 7.4 mm outer diameter, a 5.0 mm inner diameter and a center pin; a function LED is built into the connector. The connector cable is approximately 1.75 m long.
The listed compatible models include Dell Precision M6700 and Alienware X51. Check that your laptop is supported and uses this connector. The listed package includes a three-pole C13 power cable, which provides the mains connection alongside the laptop cable.