Razer SmartSwitch Dual Wireless to quick toggle between Razer HyperSpeed Wireless and Bluetooth 250g Ergonomic Design for All-day Comfort Both Indoors and Out Razer TriForce 40mm Drivers for High-end Audio Performance Detachable Razer HyperClear Cardioid Mic for Crystal-clear Voice Capture When Needed On-Headset Controls for Greater Convenience