Go down and check coupons out. Remember to check price history if it is available. Do you want to know what the best price is?
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):
Material: TPU, Waterproof IP67 waterproof, Charging Type: Magnetic charging, Product weight: about 74.6g, Length: about 120-220mm, Resolution: 240*204 pixels, Standby Time: About 168 hours, Width: about 26mm, Charging Time: About 2 hours, Size: 1.22inch, Type: IPS Color Display, Dial material: DLC (Drilling Carbon Coating), Battery Capacity: 180 mAh, Dial size: about 50*50*14.8 mm
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($36.89): band10
2. ($36.89): zeblaze10
3. ($36.89): BGZeblaze10
4. ($36.89): BGAFF10OFF
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): e2bcea, ECG10, zbl399, bg52354, BG39ECG, 2019SPEDM, AFfbG10, 502C6B, BGBFAFF2019, BGNV3E, BGNV3ECG, BGVDay10%off, BG25ECG
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Price history and price alert
Check out price history chart (for all/most countries) for Zeblaze VIBE 3 ECG Smart Watch.
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)).