Go down and check coupons out. Remember to check price history if it is available. Best price?
Double Button Version, Working humidity: 0%-85%RH, Working temperature: -10~+40°C, Version: Single Button Version, Triple Button Version, Rated Voltage: AC250V, Rated Current: 16A, Product size: 86*86*39.2mm, Installation Hole: 60mm
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 China. Hmmm… There is no active coupon in Banggood at this moment.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/5cd
Old coupons (from the oldest to the newest): BGYEE11COU, BGYLKG12YL, bgnewleds, BGLIGHT2020, BGYEBWCN, BGdragonBoat, bGhOnEy10, BGAFF10OFF, bgshOOp10, BGYEE20COUPON, BGLIGHT0920, BgoFErTaSchInA10, BGELIG0920, BgcLuBofErtA10, BGYEE2021, BGYEEL10, BGHONEY2110, BG10OFFAFF, BGwhielabel, BGLIG12, BG10OFFAFF1, BGYEELIGHT21, 00c906, BG00c906, ADMITAD2212, 2022ACTIESNL, Terence, BGLED2203
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 3 another warehouse/versions!
1. China – Yeelight YLKG13YL Double Wireless Smart Switch ($-3)
2. China – Yeelight YLKG14YL Triple Wireless Smart Switch ($-3)
3. Europe – Yeelight YLKG13YL Double Wireless Smart Switch [EU] ($-3)
Price history and price alert
Here is price history (for all/most countries) for Yeelight YLKG12YL Single Wireless Smart Switch.
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)).