Length 1m/1.8m, Wire Core 22 AWG Power + 32 AWG Tinned Copper(Data)* 3, USB2.0 A TO Micro USB, Material Protective Tinned Copper Mesh, Up to 3A, Nylon Cloth, Data Transmission Speed 480Mbps, Color Red/Black, Aluminum Foil Shielding, Port USB2.0 A TO USB Type C, External Diameter 4.0mm, Output 3.6-12V.
Price history, coupons and price alert are available on this page. 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):
Banggood
Banggood warehouse is located in China.
Link: Banggood product page
1. ($5.39): 10%ForBGBW
2. ($5.39): 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): BGtc20bg, AFfbG10, BGVDay10%off, BGTC201, BGAFF10OFF, bGhOnEy10, BGXMI15, BgcLuBofErtA10, BG20CHARGER, 10%ForNewBW, BGMBCBLE
(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-TC20 3A Magnetic Type C/Micro Cable 1m/1.8m. The lowest price was: $4.22.
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)).