HP M42546-001 is a 200 W HP Smart AC adapter for powering a compatible laptop. HP lists this exact part number among its PFC adapters with a 4.5 mm connector.
Its specified output is 19.5 V DC at 10.3 A. These details identify the adapter’s rated power and electrical output. The M42546-001 reference and 200 W rating distinguish it from other HP adapters in the parts listing. The source does not specify included cords or other package contents.