IMPACT SC 635 USB Premium, wired, single-sided headset with connectivity to PC/softphone via USB or mobile devices via 3.5 mm jack. Perfect speech and outstanding sound are enabled by an ultra noise-cancelling microphone. Enjoy UC optimized and Microsoft Teams Certified calls that can be managed seamlessly with in-line call control for excellent customer experiences. Designed for modern contact-centre agents requiring outstanding audio performance, durability and added mobility.