Shaped like a hockey puck and larger than many of the Bluetooth headsets we’ve recently tested, Dragon V2 uses its unusually large, plastic shell to house an eight-hour battery, dual microphones that promise noise suppression, and a Class 1 Bluetooth chip that promises to let users achieve wireless distances of up to 300 feet from their devices. Callpod includes charging cables, wall and car adapters, a carrying case and a replacement eartip…