| FeaturesAllows parties on both sides of the conversation to talk and listen at once.Battery-powered. The only cable needed is the one from your mobile phone to the hands-free unit(included)Uses a special noise suppression circuit so that surrounding noise is nearly eliminated, even at highway speeds.Uses an energy-saving circuit to turn itself on and off automatically. Average battery life with normal use is about 6 months Energy-saving circuit turns off the unit after 2 minutes of silence from other party. | 
