The Sennheiser RI 810-S is an infrared bodypack receiver to be used with the TI 810 transmitter. It features a large, easy-to-use volume knob and a 3.5mm jack so you can use an induction neck loop (hearing aid must have telecoil), a direct audio input to a behind-the-ear hearing aid, or headphones.
3.5mm Jack for Use with the Headset of Your Choice
Easy-To-Use Volume Control