Explorer™ 500, the first dedicated pediatric instrument from Siemens. The Explorer’s pediatric earhook was designed specifically for babies and younger kids, so it is easy to screw on, but difficult to screw off, so babies don’t remove it from the instrument while parents can. The technology features, available on Explorer’s Tek® option, were developed specifically with teens in mind. The Tek wireless enhancement allows teens to stream audio from cell phones, MP3 players, TVs and other audio sources directly to their hearing instruments, with stereo sound.