BTI Bluetooth Helmet Headset (Set of 6) - Mobile, GPS, Intercom (6 people, 3280 ft) Calling Features - This Bluetooth headset device allow users to have hands-free access to their mobile phones, supporting calling features such as voice dialing, auto receive, auto reject /hang-up calls, and last number redial. To answer calls, users can press button or set it up on auto answer. Intercom - Special feature to allow up to 6 users to communicate all the time (one-to-one) via built-in intercom system. All users can communicate via intercom at the same time, up to 3,280 feet (1000 m) apart from each other. GPS support - It can connect to Bluetooth-enabled GPS systems, allowing the users to listen to GPS voice instructions. Listen to Music - Users can listen to music on their or mobile mp3 music app, or Bluetooth-connected MP3 players, with built-in music controls for play/pause, and next/previous track/song. Superior Sound & Voice Quality - DSP noise reduction and high-speed processing to ensure a clear call quality. With DSP echo cancellation and noise suppression technology, crystal clear voice quality is guaranteed in a high speeds (up to 75 mph). Heavy-Duty / Water Resistant - Designed and engineered for Heavy-Duty Performance. All Weather Water Resistant. Button panel is water-proof and sun-proof, while the design is durable.