, CE, User Manual, Wireless Standard: IEEE 802.11 b/g/n 2.4GHz;, Max Power: 2200W;, Max Current: 10A;, Power Supply: AC 100-240V;, FCC, Enclosure Material: ABS V0;, Quick Installation Guide, Gang: 1 Gang;.
Basically copy coupon, view price history or create e-mail price alert. 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 and price update (UTC):
Banggood
Banggood warehouse is located in China. Well, there is one coupon available right now.
Link: Banggood product page
1. ($13.74): BGSmart6
coupon code has to be applied in shop’s cart after clicking “Proceed to checkout”. Click to copy code and open shop.
Exclusive Allowance Coupons: https://bit.ly/3xWgD9k and https://couponsfromchina.com/short/i1u
Old coupons (from the oldest to the newest): elec, BGbasicr3, SONOFF15, BGVDay10%off, bGhOnEy10, BGSMOFF, BGSONOFF15, BGELIG0920, 13f142, BgcLuBofErtA10, BGSONOFF16, BGAFF10OFF, BGSTHO15, BGCuponation10, BGHONEY2110, BGSHOM15, BGSHE15, BG9395a9, 6GSGIT, BG15Sonoff
(you can check these old coupons out, but these probably won’t work)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – SONOFF BASIC R3 10A 2200W Smart Switch [EU/UK] ($-3)
Price history and price alert
Price history (for all/most countries) for SONOFF BASIC R3 10A 2200W Smart Switch is here. The lowest price was: $5.77.
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)).