New ergonmoic design of the original PockeTalker Pro designed to improve communication in difficult listening situations; Built-in microphone picks up conversations with additional plug-in mic included in packaging to help during more difficult listening situations; Built-in t-coil enables user to hearing in looped environments; Right and left volume controls; Tone control; Operates on 2 AAA batteries (included) which lasts 100 hours; 2 listening options packaged including dual stereo headphones and earphones; 5 year warranty.