Audio Technica ATW-2129BI two-notes The main difference is that

The main difference is that they chose to go with a pressed cone as opposed to a lapped

The black KSM8/B Dualdyne Dynamic Handheld Vocal Microphone from Shure is a dual-diaphragm dynamic microphone crafted for vocal reproduction and sound-reinforcement in live performances and top-tier professional venues

4-Channel Audio Mixer: Mix up to four audio signals simultaneously

tap into motion recording and the onboard arpeggiator to make your musical lines dance

Audio Technica ATW-2129BI two-notes The main difference is thatThe Audio Technica ATW 2129b Wireless Lavalier Microphone System delivers professional features and wireless microphone quality, while remaining a cost effective solution for presentations, performance PA, houses of worship, nightclubs, restaurants, bars, and more. The system features the ATW R2100b receiver with UHF diversity reception, 10 user selectable frequencies, automatic frequency scan and Tone Lock squelch system for interference free