You can create price alert here, copy coupons and view price history. What is best price?
IP rating: IP68, Bluetooth Version: Bluetooth 4.2, Screen resolution: 240x 240, Built-in chip type: Nordic 52832, Battery Capacity: 350mAh
Aliexpress
There’re some similar (or not) items on Aliexpress
Click here to search by yourself. Here are coupons that you can use.
Latest coupon code price check (UTC time):
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: $32.99.
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)).