Wireless Microphone Market Size, Share & Covid-19 Impact Analysis, By Type (Handheld, Bodypack, and Tabletop), By Frequency band (Ultra High Frequency (UHF), Very High Frequency (VHF), 2.4 GHz, and Others), By End-user (Corporate, Retail, Transportation, Education, Healthcare, Sports and Entertainment, Others) and Regional Forecast, 2020-2027