Samsung Gear VR Rechargable HMD Tracking Ball

This is a rechargeable light-weight (16g) tracking ball for use on Samsung Gear VR. I use this with the PSMove Service for tracking my head position in Steam VR.

The base of the case can be slid under the front lip of my Samsung Gear VR 2016 model, this makes it easy to remove and doesn't need any velcro etc...

Can be easily removed but is so light I don't noticed it i.e. my gear vr weights 344g vs 360g with the tracking ball (both without my phone attached).

[Edit] Battery life is real