The Gemini Vent Mounttakes a bit more work to install than the Gemini Flex, but the results are worth it. You'll be left with a very sturdy device mount that locates your phone in a perfect position for easy navigation. The installation is 100% reversible, with no permanent modifications necessary. The spacer ring is machined and anodized aluminium and the rigid arm is powder coated steel. The same ball joint is used. For those seeking the ultimate in convenience, the Gemini Vent Mountis the perfect option. This kit comes with amagnetic base for mounting. If your phone is QI equipped it will stick to the magnet base straight away. If not, you can either attach an included adhesive backed metal plate to your phone, or simply slide one into your case.