– Model: HHT210, – AC power input: 100 – 240V AC, 50 / 60Hz, 6.3A (max), – Max power: 1380W at 230V, 660W at 110V, – USB output: DC 5V 3.5A (max), – Certification: RoHS, CE, FCC.
Basically copy coupon, view price history or create e-mail price alert. Let’s see what best price is ATM.
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 price update (UTC time):
Price history and price alert
Check out price history chart (for all/most countries) for International 4 USB Port Travel Charger Adapter. The lowest price was: $5.99.
Price records source(s): Gearbest
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)).