A Direct Audio Input (DAI) cable will plug into the boot or shoe of any BTE hearing instrument. The DAI cable plugs into the 3-pin socket located on the bottom of the BTE boot or shoe. While one end of the DAI cable is a 3-pin socket, the other end is a standard 3.5mm plug that will fit most headphone jacks. BTE hearing instrument must have a boot or shoe installed by manufacturer Cable directly connects to any equipment with a 3.5mm stereo headphone jack Connect to: MP3 players iPods CD players Portable music devices Computers Digital voice recorders Electronic keyboards Etc. Options available: Custom ($59.95+) Monaural or Binaural 3-pin socket on one end (or any other socket to fit your needs) Length: Any size to fit your needs Color: Beige 3.5mm stereo plug (or any other plug to fit your needs) Please call 1-800-216-8775 with your specifications to get exact cost & to place order Monaural ($49.95) (pictured above) One 3-pin socket on one end for use with one hearing instrument Length: 31 in. Color: Black Right angled blue 3.5mm stereo plug Allows a single hearing instrument to listen to both channels of a stereo sound source Binaural ($56.95) Two 3-pin sockets on one end for use with two hearing instruments Allows both hearing instruments to listen to both channels of a stereo sound source V-cord Length: 39 in. Color: Black Right angled blue 3.5mm stereo plug