Battery for VIVE Focus Series Virtual Reality Headset you can use the tracker

you can use the tracker in supported PC VR titles

but it supports the Facial Tracker for VIVE Focus Series

heavy makeup

Charging time

Battery for VIVE Focus Series Virtual Reality Headset you can use the trackerExtend your virtual reality sessions with a spare headset battery. Lets you continue using your VIVE Focus Vision1 or VIVE Focus 3 while its main battery is charging. The swappable battery design enables easy charging for all day VR headset use. 1. VIVE Focus Vision has a built in reserve battery, allowing you to swap the VIVE Battery for Focus Series in the rear battery case without losing power for up to 20 minutes.