You can create price alert here, copy coupons and view price history. Let’s see what best price is ATM.
Attended mode: Start-up automatic pairing, Charging time: About 1 hour, , Frequency range: 2.4G, Battery capacity: 90mAh, Duration of flight: About 10 hours, Transmission distance: : About 20 meters, Charging current: 5V 100mA, Product name: Wireless collar clip microphone
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest price update (UTC time):
Banggood
Banggood warehouse is located in China. We have found one coupon for this product!
Link: Banggood product page
1. ($16.79): BGAudio9
paste coupon code in your cart and click Apply after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG487be0, BGAudio3
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for SX960 2.4G Wireless Collar Clip Microphone is here.
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)).