Vive Stylus, simple non electronic device that plugs into the end of the VIVE controller.
The vive stylus - just plugs into the bottom of the VIVE and comes with an asset that mimics its exact look and dimensions in UNITY or apps that support it. No electronics, this device is just plastic and will not harm the VIVE controller or use up the battery. Preorder now by emailing firstname.lastname@example.org. Shipping in July 2018.