LED load: 1C/2C: 150W/110V(per channel), Standard: US/UK/EU, Model: T2, Gang: 1 gang/2 gang/3 gang, 2C: AC 100-240V 50/60Hz 2A/Gand 4A/Total, Enclosure Material: PC V0 + toughened glass panel, EU/UK Size: 86*86*35mm, Input: 1C: AC 100-240V 50/60Hz 2A Max, 300W/220V(per channel), RF: 433.92MHz, 3C: AC 100-240V 50/60Hz 3A Max, US Size: 120*74*38mm, Output: 1C: AC 100-240V 50/60Hz 2A Max, 3C: AC 100-240V 50/60Hz 1A/Gang 3A/Total, 2C: AC 100-240V 50/60Hz 4A Max, Operating systems: Android_4.1 or higher&iOS 9.0 or higher, 100W/220V(per channel), 3C: 60W/110V(per channel), Color: White, Wireless Standard: IEEE 802.11 b/g/n 2.4G.
Go down and check coupons out. Remember to check price history if it is available. 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 China. So I have checked for active coupons (all category coupons and old ones), but there was no working coupon in Banggood.
Link: Banggood product page
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): elec, SONOFF15, 13f142, BGVDay10%off, BGMPB2020, bGhOnEy10, BGSMOFF, BGSONOFF15, BGELIG0920, BgcLuBofErtA10, BGSONOFFT2, BGSONOFF16, BGAFF10OFF, BGSTHO15, BGHONEY2110, BGSHOM15, BGSHE15, BGSONT2, BG1470884, BG0216fe, ADMITAD2212, BGSmart6, 8Couponsde, MVC8SPRING, 8BGwbg2204, 2203ActiesNL, tRaDetRaCKeR, 8wEbgaInS5, pROMo8cuPoN, BGJUNEGSG9, BG15Sonoff, BG8ReviTrage, Cuponation9, 9OFFSUMMER, BG91bb07, BG390dee, BG669061, BG8ac66c, BGRA526
(these codes were not working in latest coupon update, but you can check them out anyway)
Other warehouses/versions
This item is available in 2 another warehouse/versions!
1. Europe – SONOFF T2 3 Gang TX 433Mhz WIFI Wall Switch [EU] ($-3)
2. Europe – SONOFF T2 2 Gang TX 433Mhz WIFI Wall Switch [EU] ($-3)
Price history and price alert
Check out price history chart (for all/most countries) for SONOFF T2 1 Gang TX 433Mhz WIFI Wall Switch. The lowest price was: $8.99.
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)).