Case temp: Tc +80℃(Max.), Product type: WiFi Curtain Module, Dims(W*D*H): 52*47*18mm(without clip), Operation range: ≤200m, IP rating: IP20, RF frequency: 433MHz /encoding 1527, Operation temp: -10℃-+40℃, Voltage: 90-250V AC 50/60Hz, WiFi frequency: 2.4GHz-2.4835GHz WiFi, Power Load: 500W(Max.), Current: 2A.
Go down and check coupons out. Remember to check price history if it is available. 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 
. I don’t think there is an active coupon right now – at least in my database. Uhm… There’s no price history (in my database) for this product right now.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG1679938, 6GSGIT, BGSmart6, MVC8SPRING, 8BGwbg2204, 8wEbgaInS5, pROMo8cuPoN, BGJUNEGSG9, Cuponation9, 9OFFSUMMER
(sometimes old coupons work, so you can check them out (this site checks them on every price update))
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – MoesHouse MS-108WR WiFi RF Smart Curtain Blinds Module ($-3)
Price history and price alert
Not enough data to show price history chart… $11.99 is the only recorded price. It was not cheaper than that since we have saved it in DB.
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)).