Andrea Communications C1-1024400-3 Model ANC-750L Stereo Analog PC Headset, 40mm mono (monaural) speaker with deep bass sound delivers crystal clear audio, Reversible for left or right side usage Active noise-canceling (ANC) microphone meets the highest standards to receive the coveted "6 Dragon" rating for speech accuracy by Nuance Pro-Flex wire microphone boom for perfect placement Stainless steel adjustable headband folds flat for storage Convenient in-line mute control Extra long 8-foot shielded cable with quick disconnect connector and color-coded 3.5mm plugs for PC use