Outstanding sound quality 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 perfect in noisy work environments. 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. build to last Most phone headset with stainless headband, quality plastics and thoughtful design very tough. Attention: Not for the VOIP phones or Telephones that have USB Port. ONLY Compatible with Vista, 7, 8, 10 or later and (10.2.8 or later) size:Line length 2M Material:ABS+Metal colour:Black Package Contents: 3 x Headset Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.