This is a Ludlum Model 177 set up for personnel frisking.
The counts.pro is transmitting to the iPad, which also has a bluetooth keyboard for easier entry of badge numbers and other relevant data.
Since the data can be synced to the cloud immediately, RSO's have a chance to audit any frisks immediately.

Much happier than he looks, promise. Setting out for a quick boundary survey...

See the post in the Data Treatments section, Mapping GPS-located data using Python libraries for a depiction of the results of this walkaround survey