The Party Rocker Mixer allows your customer to input two iPods and two additional turntables or MP3/CD players. Able to output high-fidelity sound to over 150 feet, this unit features recessed wheels and a retractable handle for the ultimate in portability. Able to mix between devices with a DJ-style crossfader, the Party Rocker iPhone/iPod Mixer features heavy duty construction making it a portable and durable answer to your customers' DJ needs!