1 * Microphone, 1 * foam cap, 1 * User Manual.
Basically copy coupon, view price history or create e-mail price alert. Best price?
Aliexpress
There’re some similar (or not) items on Aliexpress
You can use link bot to get even lower price:
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($25.41): BGBRPL2
2. ($25.41): BGHOTSHOP15
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG64465c, 13f142, BGb05d1c, BGBuscape01, BG651551
(probably won’t work, but you can try them out)
Price history and price alert
Do you need price history chart (for all/most countries) for UHF Wireless Lavalier Microphone? There we go. The lowest price was: $20.99.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood and Aliexpress (only if product name will be the same as on Banggood and I will post it on social media though, so it’s more like Banggood price alert)).