I tried to build my own wireless with "really fast" bluetooth transmitter and receiver. What a failure. Beeps were heard way after I passed the item.
Tried Z-Lynk and it works like a charm. Is it really, really needed? NO, but I love the convenience of not being tied to the detector. I put the receiver in my back pocket, run the wire up under the back of my shirt or jacket and to my headphones.
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Fisher F70 w/Fisher 11” DD and NEL Snake Coil
Fisher 1280-X w/8” Coil
Fisher F2 w/4”, 8” and NEL Hunter Coil
Makro Pointer
Killer B Stinger Headphones
Garrett Z-Lynk