Wireless headphones based on a transmitter-receiver principle are inconvenient. You have separate power supply for the detector, receiver and transmitter. You still have wires, though. Here’s a first video to watch: Garrett wireless headphones.
Let me remind you: Garrett has recently rolled out a new product 2016 – Garrett Z-Lynk wireless headphone adapter. According to the manufacturer, it’s a technology from the future. And this very one will be a part of the new Garrett AT PRO 2 machine (promised for a 2017 release). All info on Garrett Z-Lynk wireless headphones is collected here.