The Fender Hot Rod Deluxe is a guitar amplifier

Guitar amplifier

A guitar amplifier is an electronic amplifier designed to make the signal of an electric or acoustic guitar louder so that it will produce sound through a loudspeaker...

 manufactured and sold by the Fender Musical Instruments Corporation. It was introduced in 1995 as part of the "Hot Rod" line of guitar amplifiers and has been in continuous production since. This model, along with the Hot Rod Deville

Fender Hot Rod DeVille

The Fender Hot Rod DeVille is a combo tube guitar amplifier manufactured and sold by Fender. It was introduced in 1996 as part of Fender's Hot Rod line of amplifiers, and since then has been in continuous production...

, were originally designated as F.A.T. ('Fender American Tube') amplifiers but this moniker was dropped in 2002 when production of this series of amps was moved from Corona, CA to Fender's Baja-Ensenada, Mexico manufacturing facility.
The Hot Rod Deluxe is an all tube

Vacuum tube

In electronics, a vacuum tube, electron tube , or thermionic valve , reduced to simply "tube" or "valve" in everyday parlance, is a device that relies on the flow of electric current through a vacuum...

 combo amp rated at 40 watts.