Callpod Dragon Bluetooth Headset Up to 100 meters (328-feet) with any class-1 Bluetooth device Proprietary two-way communication software allows two dragon headset users to talk over a 250,000 square foot area Supreme sound quality and dual-microphone noise suppression allow you to communicate in noisy environments All new adjustable ear wrap ensures a perfect comfortable fit for all-day use Multiple adapters with USB connectivity allow you to charge the dragon via laptop computer, car or wall outlet