Dimensions 74.5*46*25mm, 5V=2.4A, The Numbers of USB Port 4, Net Weight 55g, Operating Temperature 0°C – 40°C, Color Black, Input DC 12-24V, Power 50W, Model BW-SD3, QC3.0 Output DC 3.6-6.5V=3A/6.5-9V=2A/9-12V=1.5A, Spower Output DC 5V=2Ax 2.
Just check coupons out (with price alert and history). What is the best price?
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. ($12.86): BGXMI15
2. ($13.62): bGhOnEy10
this code has to be applied in your cart 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): 12blitzw, 11BWCC, BGalibuy3a, BGWC12SD3, BGBFCR02
(probably won’t work, but you can try them out)
Price history and price alert
Check out price history chart (for all/most countries) for BlitzWolf BW-TC12 3A Type-C Cable + BW-SD3 50W QC3.0 Car Charger. The lowest price was: $9.99.
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)).