Sennheiser EKI 830 IR Bodypack Stereo Receiver for Hearing Aids 2.3/2.8 MHz
It works on the two wideband frequencies 2,3 and 2,8 MHz and can be used in single channel mono or dual channel stereo mode. Sennheiser EKI 830. Receiver can be connected to hearing aids. Receiver is also ideal for use with headphones.