@GainOfDystopia @SiyuanWang_PhD I think it's be very useful mounted permanently on the roof of the vehicle. In that case it would disinfect from previous passengers over time, even if infection from say the immediately previous passenger might not yet. But less so carrying a portable device yourself.
@GainOfDystopia @SiyuanWang_PhD 我认为永久安装在车顶上非常有用。在这种情况下，它会随着时间的推移对之前的乘客进行消毒，即使之前的乘客可能还没有感染。但自己携带便携式设备则更少。