Color: White, Security Mechanism: WPA-PSK/WPA2-PSK, Enclosure Material: Fire-retardant ABS V0, Max Current: 15A(total) /10A(1 gang), Humidity: 5%-95%RH / Non-condensing, Gang: 2, Max Power: 3300W(total) / 2200W(1 gang), Frequency: 802.11 b/g/n, Product Dimensions: 54*49*24mm, Power Supply: 100-240V AC, Operating Temperature: -10ºC-40ºC.
Price history, coupons and price alert are available on this page. You probably want to know what is the 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 Europe 
. I couldn’t find any coupon for this product on latest product update. I don’t know if this is a good price – number of records in my database is too low!
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/i1u
Old coupons (from the oldest to the newest): BGDUALR3, BGDUALR313, 13f142, BG36c08a, BGee1672, BG619c1a, 6GSGIT, ADMITAD2212, BGSmart6, 8Couponsde, MVC8SPRING, 8wEbgaInS5, pROMo8cuPoN, BGJUNEGSG9, BG15Sonoff, BG8ReviTrage, Cuponation9, 9OFFSUMMER, BG32140d
(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. China – SONOFF DUALR3 Dual Relay Module Switch ($17.99)
Price history and price alert
It’s a new item in our database, so I can’t create price history chart. We have saved this price in database: $12.99.
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)).