Zeiss VR One Connect

"ZEISS VR ONE Connect gives you access to a large number of premium VR games on SteamVR™ – with your mobile VR headset. Connect your smartphone to your gaming PC and the two ZEISS VR ONE Connect Bluetooth® controllers and experience premium VR games with three degrees of freedom (3DoF) controls."

https://www.zeiss.com/virtual-reality/vr-one-connect.html
https://www.zeiss.com/corporate/int/zeiss-corporate-newsroom/news/press-releases.html?id=zeiss-vr-one-connect_en_2017