Testing and working for Evaluator software which can run BS4142 calculations, manual or auto Mark up of measurements and calculate event LAeq and SELs and many more parameters.  

It appears to also be licence for the Protector Software OCC-1 although I have not tested that myself but when this software opens up it does not state that there is a missing Licence key.

Full access to Evaluator for accessing measurements from B&K range of testing equipment.

Typically used with the B&K 2260 / 2250 range of sound level meters.

I also have a full B&K 2260 available in great working order with pre-amp, mic, power cable, carry case etc... - please message for more information.