What does the realUV flashlight battery charger have? USB-C or USB 3 or old USB?

I bought the product, realUV flashlight. I liked it. So about battery and charger set. I'm interested in buying it cuz I forgot to add accessories to buy it. I have questions about the charger set. What does it have? USB-C or USB 3 or old USB?

We offer a flashlight charger and battery set that will work great with the flashlight, and it features a micro-USB port. We do not see any explicit documentation on the USB protocol, but based on the port connector type, we believe this would fall under the legacy USB standards (not USB-C or USB 3.0).