OUTSTANDING SOUND QUALITY HD audio sound and voice headset lets you have lifelike, vibrant conversations.You can hear music and conversations with complete clarity. All tones, from high to low and everything in between, sound full and natural.Noise-cancelling microphones reduce unwanted background noise and are ideal in noisy work environments. | ALL-DAY COMFORT This telephone headset comes with large size soft leatherette ear cushions for super comfort wear. Adjustable headbands for different head sizes and 330° rotatable microphone boom enable you to find perfect fit. | BUILT TO LAST Most durable phone headset with stainless headband, quality plastics and thoughtful design make it very tough. Reinforced Kevlar cord is built to withstand demanding environment and is protected against office chair wheels, sharp objects and daily use. | ERGONOMIC AND PROFESSIONAL DESIGN This headset has a quick disconnect plug (compatible with Jabra headset). You can leave desk while on call. Hearing technology removes sudden loud sounds or tones before they reach your ears.This keeps the sound level in the safe range and protects the user against sudden high peaks in volume. | COMPATIBILITY Both RJ9 and 3.5mm jack allow one headset for using with different devices inclduing deskphones and mobiles iPhone Samsung and most other Androids. Please check in Product Description for deskphone compatibility. Please contact us freely for any compatibility guide.