In this video:
testing pickups on an acoustic guitar
piezo, magnetic and microphone
How to install a pickup on a guitar
X2 DOUBLE Wireless Pickup Review
Microphone BM 800
Store link
https://a.aliexpress.com/_ALkpz5
Pickup clothespin Cherub WCP-55
Store link
https://www.bigtv.ru/product/zvukosnimatel-cherub-wcp-55-150173/
X2 DOUBLE Wireless Pickup
Store link https://a.aliexpress.com/_AqMzhz