Rated power: 100W Input voltage: 12V Output voltage: 220V (50Hz) USB output: 5V / 3A, 12V / 1.5A Reactive current: 0.4A and less Power-supply efficiency: 85 percent and more Operating temperature: -10 – 50 Deg.C, 9V / 2A.
Basically copy coupon, view price history or create e-mail price alert. You probably want to know 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 and price update (UTC):
Banggood
Banggood warehouse is located in China. Only one coupon available!
Link: Banggood product page
1. ($61.37): BG10OFFAFF1
apply code in your basket (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): e2bcea, 330a5a, BgAuMotor, b71c67, AM15prime, AMPrime01, Automo, Automo1, BGAutos, BGSMARTMI1, BGJulyCAR01, BGCARELEC, 7d18f7, BG2020CAR, BGAFF10OFF, BGCuponation10, 13f142, BG10OFFAFF, BGwhielabel
(there’s a little possibility that old coupon will work)
Price history and price alert
Here is price history (for all/most countries) for Xiaomi MiJia Car Inverter 12V to 220V. The lowest price was: $35.99.
Price records source(s): Gearbest, 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)).