Compatible OS Android, IOS, GPS GPS Positioning, Screen Display 1.3in Round AMOLED Capacitive Touch Screen, 90% Color Gamut, Battery 420mAh, Sensor 9-Axis Sensor, Waterproof IP67 waterproof, Screen Resolution 360×360 pixels, GLONASS Positioning.
Basically copy coupon, view price history or create e-mail price alert. What is 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 price update (UTC time):
Banggood
Banggood warehouse is located in China. I can’t find any active coupons for this product in Banggood.
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/i1u
Old coupons (from the oldest to the newest): PICODICOM, TTxBG10, BGOD1, 2019SPEDM, AFfbG10, aff7off, 502C6B, BGBFAFF2019, BGCITYADS2019, BGMPB2020, BGAFF10OFF, bGhOnEy10, BGdragonBoat, BGSS10%SW, bgwp, Email5, BG11SHOP, band10, BGHBHJ106, BGCuponation10, BGWRIBAND10
(probably won’t work, but you can try them out)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi YUNMAI YW-W1801 Smart Watch Chinese. The lowest price was: $146.99.
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)).