EWeLink WiFi EU Plug Smart Power Socket [EU] (Dimensions type: 478x 478x 670mm, Rated current: 10A, Net weight: 68.4g, Plug type: EU plug, Housing material: PC/ABS, Wireless type: WiFi 2.4GHz b/g/n, APP Name: eWeLink, Rated power: 90V~250V AC).
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 price update (UTC time):
Banggood
Banggood warehouse is located in Europe 
. Sorry, but there’s no price history in my database. There is one coupon available! Pretty cool, huh?
Link: Banggood product page
1. ($11.04): BGSmart6
paste coupon code in your cart and click Apply 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
Price history and price alert
There is only one database record (it was for $11.04), so you can’t see price history chart.
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)).