Supported OS: iOS 9.0/Android 4.0 and above, Reted voltage: AC 100-250V 50/60Hz, Rated Power: 2500W, Model Number: Broadlink SP4L EU, Rated Voltage: 110-250V, Plug Type: EU, Wi-Fi Frequency: 2.4 GHz 802.11 b/g/n, Rated Current: 16A, App: Broadlink, Single USB Max Output: None.
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.
Updated:
Banggood
Warehouse in China.
Link: Broadlink SP4L-EU Smart Wifi Socket
Price: $-3
It looks like this item is out of stock in Banggood. If you found it then please send me the link. I will replace it.
Click here to search on Banggood!
Additional Banggood coupons:
1. First page
2. Second page
Other warehouses/versions
This item is available in 1 another warehouse/version!
1. Europe – Broadlink SP4L-EU Smart Wifi Socket [EU] ($-3)
Price history and price alert
Do you need price history chart (for all/most countries) for Broadlink SP4L-EU Smart Wifi Socket? There we go. The lowest price was: $5.99.
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)).