Maximum operating distance: 60 m/104 ft.Connector Type:USB Type A Audio Performance: Adjust The Noise Canceling Level For Your Personal Preference With Three Options Of Advanced Digital Hybrid Active Noise Canceling (Anc)-High, Low And Off Poly Acoustic Fence Technology: Advanced Multi-Microphone Noise Canceling So Callers Hear You And Not Your Surroundings Smart Technology: Dynamic Mute Alert Tells You If You Speak While Muted All-Day Wearing: Lightweight Headband With Sling And Plush Ear Cushions For All-Day Comfort. Up To 19 Hours Of Talk Time, With Desktop Stand For Easy Charging