From Fender:

“An updated version of the legendary amplifier thats been the heart of many guitarists rigs, the Hot Rod Deluxe IV features modified preamp circuitry, smoother-sounding spring reverb and updated aesthetics that any player is sure to appreciate. A supercharged amp decked out with player-requested features, this scorching 40-watt 1×12″ combo is ideal for guitarists who need hot-rodded power with performance to spare.”

Features include:

• 40 watts of power
• Normal, Drive, and More Drive channels
• Celestion 12″ A type speaker
• Modified preamp circuitry for increased overdriven note definition
• Spring reverb modified for improved smoothness
• Lightweight Pine cabinet
• Two button footswitch and cover included