Pro Ears Pro Hear Behind the Ear Digital Hearing Device comes with: compact hard-shell carry case, #312 battery, cleaning tool, three size comply foam tips N- 50, users manual and ear plug. The Pro hear II+ really steps up the game with a 12 band gain adjustment, three layered noise reduction and advanced adaptive feedback cancellation to add up to 22 db. of added stable gain. All of that means that you get the ability to hear the faint sounds you could not hear before with incredible clarity and focus while still protecting your hearing from loud or Impulse sounds. The two channels are programmed to be responsive to a wide range of noise intensities, something you cannot get with other two channel btes. The Pro hear II+ is ideal for someone who wants high quality digital hearing enhancement to aid their hearing and provide additional protection.