Might can run RF base from a USB port, depends on the amperage needed.
Have them upgrade their cordless phones. Most modern cordless phones are DECT6.0 1.9GHz. Less interference and better range for the phone too.
Haven't heard the RS160 being discontinued yet. Doesn't say EOL with Sennheiser. You can also pair other Sennheiser headphones with KLEER technology to that TX160 RF base station.
I agree the power button on the HDR160 headphones, is in a stupid place (right between the vol +/-). Takes some getting use to. That could be a problem for large fingers or older people named Ken :lol:
Was not aware of the power time out. Since the power button is right on the front, top, edge - seems easy enough to have the base velcro'd in place, at the bottom edge of the TV. Where customer can just walk up and blindly touch the power button to come on (assuming the TV isn't mounted to high). Or mounted on the wall just below or side of the TV, where the button can be easily reached but still wired easily to the TV.