jello_jeep :
Warren, I remember awhile back you said you would buy something like these if they were available.
New product for you to try. RV Headsets E asy S afe P arking
RV head sets aviation style. Claimed to have 200 foot range and powered by 9 v batteries. Voice activated transmit, and you can talk and listen at the same time for hands free operation.
Phone: (719) 338-3138
http://www.rvtoyoutlet.com/p-RV5407.html