For use with Pocketalker 2.0. Use with hearing aids equipped with a T-coil switch or an induction earphone. 3.5 mm stereo plug, mono, 8 - 16 ohms. Moderate to severe hearing loss. Safety Breakaway Feature Integrated safety breakaway device. In the event the neckloop cord becomes entangled with a object in motion, the breakaway device will disconnect the neckloop from the user.