Acer ADAPTER.AC.51.3W (KP.05100.002) is an AC adapter listed as a notebook spare part. It supplies power to a notebook using the electrical ratings specified for this exact Acer part.
Acer lists 100–240 VAC input and 19 V, 2.7 A output for this MPN. These ratings identify its input range and DC output for powering a compatible notebook. The listing confirms the adapter’s role as a notebook component; it does not specify connector dimensions or what cables are included.