$10.59 – Weight 0.06KG, Input voltage 12V-24V, Light Color Blue/Red/Green(Optional), Color Black, Placement on vehicles Interior, Material ABS plastic, Output voltage 5V/9V, Max Single Usb Output DC 5V/3A;9V/2A;12V/1.5A, Item size 23x33mm ≈0.9×1.3inch.
You can get Dual USB QC Car Charger Socket Power Adapter 12-24V for $10.59 with coupon (from Banggood). Just check coupons out (with price alert and history). You probably want to know what is the best price?
Latest coupon and price update (UTC):
Banggood ($10.59)
Banggood warehouse is located in China. I don’t think there is an active coupon right now – at least in my database. Is it expensive? From what I can see this price is higher than average price ($7.99).
Link: Banggood product page
Price: $10.59
Additional Banggood coupons: first page and second page
Old coupons (from the oldest to the newest): BGSCM11, BGCarEle5, BG845979, BGLMQ15, BGAMMT03
(there’s a little possibility that old coupon will work)
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.
Price history and price alert
Do you need price history chart (for all/most countries) for Dual USB QC Car Charger Socket Power Adapter 12-24V? There we go. The lowest price was: $6.99.
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)).