This one of four components that make up the NEODiVR "Stealth" for the iPhone 7 or 8 Plus.
The NEODiVR "Stealth" is a lightweight openframe mobile VR HMD for the Apple iPhone. It allows 42mm aspherical PMMA lenses to be inserted, creating a sharp wide FOV mobile experience for 100s of VR apps in the iOS store. It also allows the Occipital Structure sensor to be attached, allowing their Bridge software to installed and used for the only true mixed reality experience on the iPhone.
To order the wide-angle lens & 3-DOF BT remote to turn this into a complete Occiptial Bridge system go here.
NOTE: Even though the biforcated image fills the entire iPhone Plus screen, the IPD is inccorrect with the "Stealth" lens box. However, you can still used the Bridge system for your apps and VR inside/out positional tracking. However, if you purchse the NEODiVR "poKet" the larger 50mm lenses looser IPD requirement allows viewing the Bridge apps properly.