Aliexpress
Click here… to search for 5Pcs SONOFF POW R2 16A 3500W Smart Switch on Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – 5Pcs SONOFF POW R2 16A 3500W Smart Switch [EU] (-3 USD)
Latest coupon code price check (UTC time):
Banggood
Banggood warehouse is located in China. I’m afraid that there’s no working coupon in Banggood.
Link: Banggood product page
Price: -3 USD
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
Old coupons (from the oldest to the newest): BG2070, elec, bGhOnEy10, BGSMOFF, bgshOOp10, BGSAMRTH, BGELIG0920, 7d18f7, BgcLuBofErtA10, BGAFF10OFF, BG15SH12, BGSTHO15, BGCuponation10, 13f142, BGHONEY2110, BGSHOM15, BGSHE15, 6GSGIT
(I don’t think these’re gonna work, but you can try ’em out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – 5Pcs SONOFF POW R2 16A 3500W Smart Switch [EU] (-3 USD)
Price history and price alert
Here is price history (for all/most countries) for 5Pcs SONOFF POW R2 16A 3500W Smart Switch.
Price records source(s): Banggood
Click on image to enlarge. 
You can set price alert (for Banggood).