How long is the distance of remote control (NVRsolo only for 1 or 2-bay models)

Description
How long is the distance of remote control (NVRsolo only for 1 or 2-bay models)

紅外線遙控器可作動的最遠距離為何(僅限NVRSolo的1-bay或是2-bay機種)？
                         

Solution 
The distance of remote control is 8 meters and around 15 degrees.

紅外線遙控器可作動的最遠距離約莫是8公尺遠，以及水平操作角度約莫15度。