“Battery Capacity: 850mAh Standby Time: About 7-10 days (Lite Mode) / About 1-2 days (Anddoid mode) Charging Time: About 1.5 hours Charging Type: Magnetic charging”, Operating Mode Full Touch+Press Button, “CPU: Spreadtrum9832+NRF52832 RAM: 1GB/4GB ROM: 16GB/128GB”, Camera 5MP, Model Air, Operating System Android 9.1, APP Name GaoFit, “Size: 1.75 inch Type: IPS Resolution: 320*385pixels”, Brand Rogbid, bluetooth Version BT 5.0.
Just check coupons out (with price alert and history). 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. I found coupon for you. Check this out.
Link: Banggood product page
1. ($174.79): BG8OFFCOUPON
this code has to be applied in your cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): BG11AIR, BGBFAIR, BGSFANV24, Tabby20, BGf4c675, BGcc2b0a, tRaDetRaCKeR, 8wEbgaInS5
(these coupons are old, so probably won’t work)
Price history and price alert
Price history (for all/most countries) for Rogbid Air 4/128GB Smart Watch is here. The lowest price was: $135.99.
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)).