Features AH-C620R In-Ear Headphones with Remote + Microphone Drawing on half a century of Denon headphone engineering experience, the new 2016 models are designed to combine comfort with no-compromise sound. Aimed at those who want the very best sound whether traveling, working or relaxing, the new in-ear models are packed with advanced Denon technologies, designed to deliver the best possible performance from compact, lightweight earphones. The AH-C620R, available in black and white, is the most compact and lightweight Denon In Ear headphone. It uses an 11.5mm driver, mounted in housings combining die-cast aluminum and resin, designed for rigidity and vibration-damping. Denon Acoustic Optimiser technology helps equalizing the air-pressure in front of and behind the driver. It’s all part of making the sound as dynamic and distortion-free as possible.