Bluetooth Headset Music Headband (Banggood, Aliexpress: Wireless bluetooth Headset Music Headband HiFi Stereo Sweat Absorption Breathable Yoga Cloth Sleep Music Elastic Headband with Mic – Black (the best price with coupon)).
You can create price alert here, copy coupons and view price history. Best price?
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. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($14.48): BGAudio9
just apply this code in your cart 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): BGAudio3
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Bluetooth Headset Music Headband is here. The lowest price was: $14.48.
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)).