The Vive wireless adapter, which frees the headset from the cable tethering it to a PC, will launch here 24th September and oh my giddy aunt it's £300! And the Vive Pro wireless adapter is £364!
The adapters appear to be the same. They're relatively small and light (129 grams) black devices which look, to me, a bit like a bull's head and horns. Yes they do. The adapter sits on your head on a band which attaches to the Vive headset (you could pretend to be the bull!) and receives a wireless signal broadcast from your PC by a special PCI-e card accompanying the device (make sure you have space on your motherboard).
It looks like the battery, an HTC QC 3.0 PowerBank, sits on your waist - you can see it in the picture. Battery-life is up to two-and-a-half hours and you can swap other charged batteries in and out.
Latency is apparently very low (something to do with an interference-free 60 GHz Intel WiGig signal and DisplayLink's XR codec) and the signal reaches six metres with a 150-degree field of view.
Pre-orders open 5th September at Overclockers, Scan and the Vive website.