Alvin Wang Graylin (汪丛青) on Twitter: "Good news for #ViveFocus3 and #VivePro2 users! @7invensun just announced they will release the Droolon F2 #eyetracking accessory for these devices soon. $299 with end of
Sorry, but that doesn't make sense! The Pimax Eye Tracking Module in the test! [Droolon Pi1] - YouTube
Droolon F1 + HTC Vive Facial tracker - VIVE & VIVE Pro - Community Forum
7invensun Announces $150 Eye-tracking Module Supporting All HTC Headsets – Road to VR
Disassembly VR: Eye-tracked weapon aiming demo with Droolon F1. Also would work with a Vive Pro Eye and Droolon Pi. Just look and shoot, easy. : r/Pimax
7Invensun reveals high-quality eye-tracking VR accessory for only $149 - The Ghost Howls