PLJ-8LED-C 0.1MHz ~ 2.4GHz Frequency counter - How to measure 2.4GHz frequency - Jan 17

Just curiosity, I wanted to measure frequency of FIMI X8 2022 v.1 (Spec. says 2.400 – 2.4835GHz). I have no knowledge about frequency counter and purchased PLJ-8LED-C by reading the description of measuring 0.1MHz ~ 2.4GHz. Attached 2.4/5GHz dual antenna to the frequency counter. I did trial and error for setting (manual is too difficult for me to understand). I could not get frequency FIMI X8 2022 v.1 is transmitting. It would be appreciated if experts may give guidance to measure the frequency.