Enjoy simplified mobility with the ultimate Bluetooth headset The Plantronics Discovery 640 Bluetooth headset lets you stay connected like never before. Combining cutting-edge technology and sleek design, the Discovery 640 wireless headset is ultra-light and comfortable, includes an innovative charging system, and is wrapped in a chrome carrying case. The Plantronics Discovery 640 sets the standard in style and convenience. Wherever your conversations take you, take the Discovery 640. The 640E includes WindSmart Technology.