Bluetooth Version: Bluetooth 4.2, Battery Capacity: 100mAh, Standby time: 45 days, heart rate monitor, pedometer, sleeping monitors, 50 meters waterproof standard.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
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 Hong Kong. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($25.26): band10
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): aff7off, 22honor, honor15, 21honor3, 502C6B, TTxBG10, BGhonor3E, BG3CSUM, AFfbG10, 0e7f33, BGCuponation10
(there’s a little possibility that old coupon will work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Hong Kong – HUAWEI Band 3 Smartband Blue ($-3)
Price history and price alert
Price history (for all/most countries) for HUAWEI Band 3 Smartband is here. The lowest price was: $12.99.
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)).