Plug: EU plug, Button life: 500K times, Working temperature: -10℃-45℃, Inductive load(LED/CFL): 220W Max, Dimming control: TRIAC Edge Cut, Standby power: ≤0.5W, Dimension: 86*86*43mm, Control channel: 1 CH, Input power: 100-240V AC 50-60Hz, Resistive load(Incandescent): 300W Max, Working humidity: ＜90%, Communication: WiFi 802.11 b/g/n 2.4GHz.
Basically copy coupon, view price history or create e-mail price alert. 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 code price check (UTC time):
Banggood
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BG395482, BGSMALL8, 6GSGIT, BG97c4b0, BG039991, ADMITAD2212, BGSmart6, 8Couponsde, MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, hoNEYbGdeAlS, BGJUNEGSG9, BG8ReviTrage, Cuponation9, BG8OFFCOUPON, BGd8a086, TTBLACK5
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – MoesHouse WiFi Smart Touch Light Dimmer Switch [EU] ($-3)
Price history and price alert
Price history (for all/most countries) for MoesHouse WiFi Smart Touch Light Dimmer Switch is here. The lowest price was: $17.99.
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)).