Update README.md

Author: 21km43

README.md

@@ -11,8 +11,8 @@ This project uses [Espressif Library for KiCAD](https://github.com/espressif/kic
 Gerber, bom and cpl is placed on [production folder](/production) directory and Release. 
 
 ## Features
-* Upload method: USB-CDC (Do not use GPIO 18 and 19 when downloading)
-* USB: Type-C
+* Upload method: USB (Do not use GPIO 18 and 19 when downloading)
+* USB: Type-C (USB 2.0)
 * Regulator: [RT9080-33GJ5](https://www.richtek.com/Products/Linear%20Regulator/Single%20Output%20Linear%20Regulator/RT9080?sc_lang=en).
 * External input voltage range: 4.3-6.5V (4.5V-5.5V is recommended)
 * Power consumption (in deep sleep): 11.5µA (ESP32-C3: 5µA, RT9080-33GJ5: 6.5µA)