Price history, coupons and price alert are available on this page. Do you want to know what the best price is?
(Note: If it is used for LED or energy saving bulb /the power load should be less than 100W), RF Standard Code: 1527, Color: White /Black /Gold, Type: 1/2/3 Gang, Wireless type: Wi-Fi 2.4GHz, Load Power: 3-300W/gang, Working voltage: 220V AC, RF Frequency: 433MHz.
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 and price update (UTC):
Banggood
Banggood warehouse is located in Europe 
. I’m afraid that there’s no working coupon in Banggood. I’m not sure about the price, coz I have only 1 record(s) in my database.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BG1735414, 6GSGIT, ADMITAD2212, BGSmart6, MVC8SPRING, 8BGwbg2204, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BG8ReviTrage, Cuponation9
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – Moeshouse 220V WiFi Smart Light Switch RF433 ($-3)
Price history and price alert
There is only one database record (it was for $18.46), 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)).