Blood Oxygen Monitor Support, Charging Type: 2Pin Pogo Pin, Standby Time: About 40 days, Bluetooth Version BT 5.0, APP Name Paiactive, GPS Support, Type: IPS, Charging Time: About 1.5 hours, Battery Capacity: 180mAh, Multi-sport Modes Support 17 sports modes, Using time: About 10 days, Size: 1.1inch, Resolution: 240*240pixels, Waterproof 5ATM Waterproof.
Price history, coupons and price alert are available on this page. 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 coupon and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong. I don’t think there is an active coupon right now – at least in my database.
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!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): band10, BGURUN, BGa90023, BGWRIBAND10, BG83917d, BGc70579, BGbf11dd
(I don’t think these’re gonna work, but you can try ’em out anyway)
Price history and price alert
Price history (for all/most countries) for UMIDIGI Urun Fitness Tracker is here. The lowest price was: $17.37.
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)).