Aliexpress
Here are coupons that you can use.
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – SONOFF Micro 5V Wireless USB Smart Adaptor (-3 USD)
Latest coupon and price update (UTC):
Banggood
Banggood warehouse is located in Europe 
. I’m afraid that there’s no working coupon in Banggood. I don’t want to misguide you about the price. I don’t know if it’s good, because I don’t have enough records in my database…
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): elec, BGTT10, bGhOnEy10, BGSMOFF, BGSONOFF15, BGuk799, BGELIG0920, BgcLuBofErtA10, BGSFMicro, BGSONOFF16, BGAFF10OFF, BGSTHO15, BGCuponation10, 13f142, BGHONEY2110, BGSHOM15, BG15Sonoff
(system checks these coupons on every price check (like once per 24 hours), but you can check them out anyway)
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. China – SONOFF Micro 5V Wireless USB Smart Adaptor (-3 USD)
Price history and price alert
It doesn’t make sense to generate price history chart, because there is one price record which is: 7.99 USD.
You can set price alert (for Banggood).