Headset, keyboard, monitor, and mouse. Those items are probably the most personal things in your system. They are in almost constant contact with you (ok, not the monitor so much), so comfort is key. And a poor headset, like a poor keyboard, mouse or monitor, can detract from the gaming experience.
Amazing sound - deep bass and crisp highs; Customizable with Logitech Gaming software; Stable WiFi connection; Noise-cancelling microphone; Comfortable ear pads; Lightweight - minimizes fatigue
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