Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – BlitzWolf BW-SS4 Basic 2200W 10A 1/2 Way Smart Switch [EU] (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
Coupon (8.09 USD): BGSTHO15
Coupon (8.09 USD): 10%ForBGBW
Coupon (8.09 USD): BGHONEY2110
(CouponsFromChina.com tip: apply it in your cart after clicking “Proceed to checkout”. Click to copy code and open shop)
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k
Old coupons (from the oldest to the newest): BGSS412, BG12SS4, aff7off, BGBWSS41, 2020CNY, BGVDay10%off, BGSAMH, bGhOnEy10, BGSM15, BGBWSS4A, BGSMOFF, BGSAMRTH, BGELIG0920, BGBWSS4H, BgcLuBofErtA10, BGAFF10OFF, 10%ForNewBW, BGSS4FRB, BGSHOM15, 13f142
(probably won’t work, but you can try them out)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – BlitzWolf BW-SS4 Basic 2200W 10A 1/2 Way Smart Switch [EU] (-3 USD)
Price history and price alert
Do you need price history chart (for all/most countries) for BlitzWolf BW-SS4 Basic 2200W 10A 1/2 Way Smart Switch? There we go.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).