diff --git a/20. 專注/Android/ADB tcpip.md b/20. 專注/Android/ADB tcpip.md
index 404b27a..e844d72 100644
--- a/20. 專注/Android/ADB tcpip.md	
+++ b/20. 專注/Android/ADB tcpip.md	
@@ -1,10 +1,16 @@
 Use `adb tcpip` to enable ADB over network.
 
 # Setup Android Device
+## Connect Device via USB
 Connect Android device to a PC via USB, and make sure ADB recognize your device.
-```
+```bash
 $ adb devices
 List of devices attached
 0123456789ABCDEF        device
 ```
 
+## Get IP of Device
+Use below function to get IP address of device:
+```bash
+ifconfig eth0 | grep 'inet addr' | cut -d: -f2 | awk '{print $1}'
+```
\ No newline at end of file