The Poly DA Series USB-A and USB Type-C digital adapters adjust audio to each specific Poly headset for quality calls, at home or in the office.Inline controlsWith just one simple click, you can instantly mute all audio and visual transmissions - whether it's a phone call, a video conference, or a virtual meeting.Connection flexibilityAnswer soft-phone calls from any PC, no matter what kind of USB port you have. Built-in USB-A and USB Type-C connectors on the same cable.Smart headset recognitionGet incredible call quality on any Poly headset via intelligent headset recognition that adjusts audio performance to the specific headset.Quick disconnectWalk away from your desk with a click: Poly Quick Disconnect technology works with any Poly QD-equipped headset.Acoustic hearing protectionSoundGuard DIGITAL featuring advanced acoustic limiting, including daily noise exposure, G616, and anti-startle functionality.