Only use with Z23L Xiaomi Yi, the Z23S is not compatible due to shorter thread.
The Brahma Duo is designed to be a small and light 360 camera that uses two 220 degree fish eye lenses. It is not going to give a 4K output which is standard for VR headsets, however, we get an output of around 2160x1070 roughly, sometimes a little lower or higher depending on the stiching. The results can be used in VR headsets and are not bad, but 4K is really needed and if this is what you want then please look at the Brahma6. That being said this rig makes a great camera setup for Facebook and Youtube 360 videos where the resolution and quality is great. We just want you to be aware, look at the sample videos which will grow over time to see the results you can achieve. There is a slim version of this but I recommend this one.
This is something that to be honest is not simple, and we are able to supply a fully built system which will be linked to here shortly. We will have a video showing how to fit the lenses below but this will invalidate your camera warranty and if you do not do it correctly could ruin the camera, just saying. If you are going to attempt it, you need good eyes and a steady hand.
Sample Videos https://www.youtube.com/playlist?list=PLJbDbBITZMClRiqTJNsgk4R4N7FY_Tt0P
Story on the journey for this product. http://www.vrexperience.net/Newsroom.aspx?id=128
Android control software in video. http://bluestudios.co.uk/Brahma/
You will need 360 stitching software and these are the ones we recommend at the moment. Please mention this rig when ordering. http://www.kolor.com/autopano-video/ and http://www.video-stitch.com/studio/
2 x Xiaomi Yi's http://www.gearbest.com/action-cameras/pp_153557.html
2 x 220 Degree lenses http://www.gearbest.com/action-cameras-sport-dv-accessories/pp_269507.html
2 x M6x8mm Hex bolts http://www.ebay.co.uk/itm/221107269665?_trksid=p2057872.m2749.l2649&var=520105268023&ssPageName=STRK%3AMEBIDX%3AIT
A number or small elastic bands, smaller than lens.
1 x Mount Screw adaptor http://www.amazon.co.uk/Phot-R%C2%AE-Professional-Female-Tripod-Adapter/dp/B00IIMJGDY/ref=sr_1_27?s=electronics&ie=UTF8&qid=1456139915&sr=1-27&keywords=camera+screw+adaptor
1 x 1/4 inch Locking nut to fix the adaptor in place.
Now please watch the video before you purchase :-)