Just check coupons out (with price alert and history). You probably want to know what is the best price?
Color Gray /Blue, Wearing Type Half-in ear, Brand Lenovo, Model XT81, IP Level Waterproof, Material ABS+Metal
Aliexpress
There’re some similar (or not) items on Aliexpress
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. I have no active coupons for you right now.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG82f19a, BGAUDIO, BG9ba0e8, BG3d864d, BG09c85d, BG5f8f2f, BG1b5830, BG6388eb, BG28ebec, BGAudio3, BGAudio9
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Do you need price history chart (for all/most countries) for Lenovo XT81 Bluetooth V5.3 Earphones? There we go.
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)).