The ultimate in day-long comfort with fantastic sound. The LH-300-DM-A4M is a single-sided, super lightweight headset designed for all-day comfort. It features a high-quality dynamic earphone with a noise-cancelling microphone and semi-rigid, fully adjustable dynamic boom mic for precise positioning on the right or left side. The wide-band earphone has a soft, pliable cushion along with headband pads that deliver all-day comfort along with a better fit, isolation, and frequency response. 6' cable terminates in an A4F connector