Ultra fast drying: This dryer uses Shark's HyperAir IQ technology that combines hot air with ionized air to dry hair quickly. No heat damage: While it uses hot air, the technology is designed to regulate the temperature to minimize heat damage. Diffuser: This attachment is not typically included with the Shark HyperAir HD112BRN according to retailers, so double-check with the seller if this is important to you. Used but like new condition.