Read microphone specifications and understand mic quality
50 - 100 dB microphone - MA-50-D - Holmberg GmbH & Co. KG - 0 - 5 mV/Pa / for aircraft / for the aerospace industry
dB Technologies UH 860 Handheld ISM Band für Ready 4 | MUSIC STORE professional
Amazon.com: VHF Wireless Microphone, Universal Handheld Karaoke Mic Speaker, Over 110 DB Outdoor Indoor Cordless Microphone System with USB Reciver for Singing, Karaoke, Speech, Wedding, Church : Musical Instruments