You can create price alert here, copy coupons and view price history. Do you want to know what the best price is?
Sensor G-sensor(KX023-1025), Heart Rate Sensor(PD70-01C-TR7) Screen Size: 1.2 inch Type: IPS Resolution: 240*240pixels Battery Battery Capacity: 230mAh Standby Time: About 30days Using time: About 7days Charging Time: About 3 hours Charging Type: Magnetic charging Appearance & Details Band Material: Steel, Leather Length: 260mm Width: 42mm Weight and Size Product size: 260*42*11.8mm Product weight: 45g
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. 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!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 16q9, 502C6B, band10, newwear10, BGQ9E, 2019SPEDM, AFfbG10, BG13Q9, BGBFAFF2019, BGSANQ9, BGNANWQ9, BGSAQ9, BGHQ9, 0e7f33, BGband10, BGAFF10OFF, BGCuponation10, BGWRIBAND10
(these codes were not working in latest coupon update, but you can check them out anyway)
Price history and price alert
Price history (for all/most countries) for Newwear Q9 Smart Watch is here.
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)).