Similar to this review, Bigscreen Beyond shows promise but remains incomplete. - Road to VR

Bigscreen Beyond is a new PC VR headset that aims to be the smallest with the highest image quality. While it is compact and delivers great visuals, it lacks built-in audio, which can be inconvenient. Users have to use their own headphones, and without a nose-gap or passthrough camera, it becomes difficult to interact with the real world while wearing the headset. The upcoming deluxe audio strap is expected to address this issue. More information and a full review can be found at Road to VRBigscreen Beyond.

Source: https://www.roadtovr.com/bigscreen-beyond-review-pc-vr-headset/