1. Noise cancelling Microphone and voice can be adjustable with excellent acoustics 2. Stainless steel arm, can be bent, not easily broken 3. Suitable to wear and free expansion 4. Considerate design, supper light 5. Handset can be adjusted 330 degrees; you can find most suitable position to wear 6. International standards for hearing protection (Less than 118db) 7. Hands free 8. Professional microphone, more stable and durable