INCLUDED - HM-4 4-Way Headphone Amplifier, 12 VDC Power Supply, Mackie 1-Year Limited Warranty, Turnstile Audio TAPH100 Studio Monitor Headphones, and H & A PlatPro 10' TRS 1/4' Male Interconnect Cable. SUPERIOR SOUND QUALITY - Experience crystal-clear audio reproduction with the Mackie HM-4, ensuring every detail of your mix or performance is accurately heard through the included TAPH100 headphones. EXPANDED CHANNEL COUNT - The 4-way headphone amplifier allows up to four individuals to monitor audio simultaneously, perfect for studio sessions, live sound, or collaborative listening environments. OPTIMAL OUTPUT POWER - Drive a variety of headphones with confidence, thanks to the robust output capabilities of the HM-4, delivering consistent and powerful sound to each connected device.