Max use distance 10m / 3.94inch, braid belt, Weight 50g, Charging interface USB standard interface, gold plated electrode, sponge, Support system bluetooth 4.0 or above, Brand Xiaomi, Charging time 2 hours, Material EVA composite imitation, Battery capacity 55mAh.
You can create price alert here, copy coupons and view price history. Do you want to know what the best price is?
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. ($60.46): BGAFF10OFF
2. ($60.46): bGhOnEy10
3. ($62.18): Email3
you should apply the coupon 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/i1u
Old coupons (from the oldest to the newest): BGkonimbesinEYE, BGOD1, AFfbG10, affbg10, BGtravel305, BGBFAFF2019, BGCITYADS2019, BGTS204, BGMPB2020
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Air Sleeping Eye Mask. The lowest price was: $52.79.
Price records source(s): Gearbest, 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)).