I bought a used Sentry H0900 wireless transmitter and headphones, cost $1.00 plus shipping on ebay. The are RF Radio Frequency. The headphones are comfortable and I really like the freedom of no wire, BUT the signal is attenuated. It may be a good system for listening to your stereo or TV but is not a good system for metal detecting.
If anyone has a wireless system that works well I'd sure like to hear about it.
If anyone has a wireless system that works well I'd sure like to hear about it.