Support App Tuya / Smart Life, Controller working frequency 2.4GHz WIFI, Feature 3 Kinds Of Restart State, Controller Operating Voltage “AC 100V-240V
60HZ/50HZ”, Current 16A, Model TMW02.
Just check coupons out (with price alert and history). What is 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 and price update (UTC):
Banggood
Banggood warehouse is located in Hong Kong. Hmmm… There is no active coupon in Banggood at this moment.
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): BG73d85c, BG9c5cca, BG299c90, ADMITAD2212, BGSmart6
(probably won’t work, but you can try them out)
Price history and price alert
Do you need price history chart (for all/most countries) for Smatrul Smart Mini WiFi Light Switch Module 16A? There we go. The lowest price was: $3.99.
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)).