Compatible OS Android 5.1 or above, Resolution: 454*454pixels 372ppi, Battery Capacity: 800mAh, iOS 9.0 or above, Size: 1.39inch, APP Name Wiiwatch2, Charging Time: About 3.5 hours, CPU: Dual Processor: MTK6739 1.25GHZ + NRF52840, ROM: 32 GB, Operating Mode Touch Screen + Function Key, Charging Type: Magnetic charging, Operating System Android 7.1.1 + Lite OS System, Using time: About 2-3 days, Standby Time: About 5-7 days (7 days standby based on switching to the Persistent Mode), Camera 8.0MP, RAM: 3 GB, Type: AMOLED.
Price history, coupons and price alert are available on this page. What is 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. I am tired of searching coupons, but I found one for you…
Link: Banggood product page
1. ($162.89): bgwp
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGOP99, TTxBG10, BGOptimuspro, aff7off, BGOPTIMUS, kospet10, BG3CSUM, BGUS001, BGBF30, BGKOSPRO, BGPro19, BGOPTIMUS3, BGOptimus139, BGKOSPET20, BGPro149, BGwkKosPro, BGKOSPET10, BGAFF10OFF, Email5, BGSWATCH10
(these coupons are old, so probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Kospet Optimus Pro 3/32GB Smart Watch [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for Kospet Optimus Pro 3/32GB Smart Watch. The lowest price was: $139.99.
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)).