Bluetooth Version: Bluetooth 5.0, Screen: OLED, Screen size: 1.5 inch, Battery Capacity: 600mAh.
Just check coupons out (with price alert and history). Do you want to know what the best price is?
Aliexpress
I could not find it on Aliexpress. Click here to search by yourself.
Here are coupons that you can use.
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in China. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($85.58): band10
you should apply the coupon in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): TTxBG10, 10lenovo, BG3CSUM, AFfbG10, 502C6B, BGBFAFF2019, BGLENOVO20, BGBGAFF10OFF
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Lenovo Watch X Plus Smartwatch Silver ($-3)
Price history and price alert
Price history (for all/most countries) for Lenovo Watch X Plus Smartwatch Black is here. The lowest price was: $55.99.
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)).