On 22 Jun 2021 11:46:09 +0100 (BST), Theo declaimed the following:
It had enough latency that White's Metal Detectors came up with a custom interface for the Spectra V3i wireless headphones. Bluetooth ended up signalling finds long after the coil had passed beyond the actual target.
{Hmm, pity... White's has gone out of business, and I don't trust Garrett to make use of the IP acquisition to produce the fancy models}