External Notebook Cooler

notebook cooler
A laptop/notebook cooler, cooler pad or chill mat is an accessory for laptop computers that helps reduce their operating temperature.

external
happening or arising or located outside or beyond some limits or especially surface; "the external auditory canal"; "external pressures"
Belonging to or forming the outer surface or structure of something
Coming or derived from a source outside the subject affected
Relating to or denoting a medicine or similar substance for use on the outside of the body
outward features; "he enjoyed the solemn externals of religion"
coming from the outside; "extraneous light in the camera spoiled the photograph"; "relying upon an extraneous income"; "disdaining outside pressure groups"