Does anyone know of a headphone that only has TWO adjustments; on/off and volume? I've used RF headphones in the past that also have a dial to tune into a specific frequency. But in this instance, I NEED one that forgoes the adjustment; it's going into a church and we don't want to confuse a senior citizen if they fiddle with any of the adjustments (thinking they are turning the volume up/down and losing the signal all together).
We are adding a hearing loop, but they would like to have a couple pairs of headphones for those who don't have hearing aides, but still need to hear the service a little better.
Scott