SADES SA901 Pro USB PC Gaming Headset 7.1 Surround Stereo Headband Headphones with Microphone Deep Bass Volume Controller with Mute Function (Black Red) 7.1 USB sound card delivers thrilling surround sound with separately adjustable levels. Advanced analog 7.1 Surround Sound Channel. Reinforced headband, which offers nine levels of height adjustment for the perfect fit Unique structure with retractable High sensitivity microphone. Little smart in-line Remote Control for sound and Mic . The driver of the headset only supports Windows system to install but Apple and other computer system are not supported. 7.1 sound channels is 7.1 simulated sound channels. Unique 4-pieces of padded headband and comfortable ear cushions guarantees hours of gaming comfort