1.Comfortable with over-head wearing style 2.Wideband audio for exceptional sound quality. 3.Volume and mute controls
1. Comfortable with over-head wearing style  2. Wideband audio for exceptional sound quality. 3. Up to 8 hours of talk time, at least 36 hours standby time
1. WideBand audio frequency makes more natural voice 2. The Ultra Noise canceling Mic filters 80% background noise 
1. The professional class headset, comfortable to wear all-day 2. The Ultra Noise canceling Mic filters 80% background noise