Resolution: 320*385pixels, Bluetooth Call Support, ECG Heart Rate Monitor Support, Bluetooth Music Support, APP Name Wearpro, AI Voice Assistant Support, Type: IPS, Compatible OS Android 4.4 or above /iOS 8.0 or above, Battery Capacity: 260mAh, Charging Time: About 2 hours, Size: 1.75inch, Bluetooth Version BT 4.0+3.0, Charging Type: Charging Base, Operating Mode Full Touch, Standby Time: About 10 days, Calculator Support, Model DT35+, Using time: About 5 days.
Go down and check coupons out. Remember to check price history if it is available. You probably want to know what is the 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 code price check (UTC time):
Banggood
Banggood warehouse is located in China. You can get coupon down below.
Link: Banggood product page
1. ($31.04): BGc70579
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): bgdt15, BGDT35P, BGDN35, band10, BGWRIBAND10, BG2d5d8f, BG51f436
(these coupons are old, so probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for DT NO.1 DT35+ Fitness Tracker. The lowest price was: $15.99.
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)).