SC 75 USB MS binaural headset Dual connectivity via 3.5 mm jack and a detachable USB cable for connecting to a smartphone, tablet, etc. as well as a PC Wideband sound for HD voice quality and a natural listening experience 2-In-1 ear cushions - Acoustic foam ear cushions or synthetic leather cover for maximum comfort ActiveGard technology protects you from acoustic shock by preventing sudden sound surges Protective nylon bag for easy storage and transport