Update README.md

README.md

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-# mobslide
+# mobslide
+
+<img src="https://github.com/thewh1teagle/mobslide/assets/61390950/1286d350-36e9-4c78-b2ef-800aa8f23865" width="130px" height="130px" />
+
+Turn your smartphone into presentation remote controller
+
+# Install
+1. Simply Download `mobslide.exe` from [releases](https://github.com/thewh1teagle/mobslide/releases) on your PC and start it
+
+# Usage
+1. Scan the QR code with your smartphone and open the link.
+Keys:
+- + Volume up
+- - Volume down
+- (Arrow Up) Next
+-  (Arrow Up Long Press) Start presentation
+- (Arrow Down) Previous
+-  (Arrow Down Long Press) Stop presentation
+