You can create price alert here, copy coupons and view price history. What is best price?
Standby time: 21 days, Battery Capacity: 210mAh, Charging Time: About 2hours
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. You can get coupon down below.
Link: Banggood product page
1. ($24.29): band10
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): 15wt, 99run, honor15, 502C6B, BGFH19r, e2bcea, TTxBG10, BGrunE, 2019SPEDM, BGkonimbesinB4, BG3CSUM, BGrunning, AFfbG10, BG12running, 0e7f33, FBCOUPON1
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – HUAWEI Honor Bracelet 4 Running Version Green ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for HUAWEI Honor Bracelet 4 Running Version Red? There we go.
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)).