RS: Wireless Headphones, after using them (long)
for more than 2 months, I have had no problems and very positive results. The catalog # is 33-1253. I got mine on sale for about $40 as I recall.
You will have to obtain (or make your own, as I do) proper adapters to use them. The first adapter, available at RS is part #274-0367 which coverts the dongle plug to a 1/4" stereo jack. This adapter alone will work with many detectors, but some require adapters to configure with their outputs. Unfortunately, many detectors don't really have a mono or stereo output jack anymore but some hybrid configuration.
The main concern, with any cordless headphone for detector use is that the signal from dongle to headphone has no LAG time. (The RS 33-1253 phones DO NOT have any lag time). Any lag time would make the audio signal heard after the target was detected and not at the exact moment of detection.
I've used the phones for more than 10 hours and no battery discharge problems. It would depend on several factors, including the numbers of signals detected in a given time frame as to how long the battery would still provide adequate power for both the dongle and phone. (The batteries are an integral part of the phone and dongle and you get a charger to charge both at same time.)
So far so good, and it's nice not to be "tied" to the detector with a cord anymore. I've hunted in both urban and rural areas and haven't experienced any interference from outside sources. I'm sure that I will, sooner or later, as so many cell phones, radios and so forth are cluttering the airwaves now. Just to be safe, I carry a pair of corded phones and also use them in colder weather to keep my big ears warm!!
Hope this helps.
Ty