50/60HZ, 3x USB Port (Support Quick Charge) Automatically Match Safety-gate Total Design Max Power 2500W 10A 250V Using environment -10℃ ~ +40℃ USB Modle Input 100-240V~, 0.5A USB Output 5V 2.1A Output power 15.5W.
Just check coupons out (with price alert and history). Do you want to know what the best price is?
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.
Link: Banggood product page
1. ($28.79): BGSTHO15
2. ($28.79): BGHONEY2110
put item in your cart and apply coupon code there after clicking “Proceed to checkout”. Click to copy code and open shop.
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): 2499XM, bgsport, 6OFFXM, affiliate6, 2019SPEDM, bgssaff9, aff7off, BGaDmITAd, BGAQ20, BGSAMH, bGhOnEy10, BGSM15, BGSMOFF, bgshOOp10, BGSAMRTH, BGELIG0920, BgcLuBofErtA10, BG15SH12
(you can check these old coupons out, but these probably won’t work)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi Mijia Four Digit Power Strip. The lowest price was: $23.79.
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)).