The AHD-D310R over-ear headphone has a 3-button remote controller as well as a built-in microphone, and provides Play and Pause functions as well as Forward and Reverse, and Volume Up and Down. They also let your answer calls on your iPhone, and can be used to record voice memos on select iPod models that support that function. With high efficiency 42mm diaphgrams and Neodymium drive magnets, the AD-D310R features the Hybrid Material Housing design, for resonance-free sound. Comfortable Over-Ear Headphones With iPhone/iPod Control. Exclusive Denon Technologies For Ultimate Sound Quality. 42mm Diaphragms With Neodymium Magnet Structure. Contoured Comfort Fit Headband. So buy this Headphone and you can Get Free Shipping on a Denon AH-D310R Mobile Elite Over-Ear Headphones w/ In-line Control & Mic (Black) for $39.99 at Rakuten.com, a $40 Savings!