diff --git a/README b/README
index b43c45c..ab1937d 100644
--- a/README
+++ b/README
@@ -5,9 +5,36 @@ Video Scanner.
 
 omvs scans all multicast ip addresses the user specifies and if omvs finds
 something, omvs tries to decode it with gstreamer and save it as png file in
-the output directory.
+the output directory. Root privilege is required to run omvs.
 
-Root privilege is required to run omvs.
+e.g.)
+-------------------------------------------------------------------------------
+$ sudo ./omvs 233.19.187.192/30 233.19.187.244 233.19.187.1
+[0x21be1e0] start scanning 233.19.187.192
+[0x21be1e0] trying to save udp://233.19.187.192:5000 to omvs_out/233.19.187.192-5000.png
+[0x21be1e0] finish scanning 233.19.187.192
+[0x21be1e0] start scanning 233.19.187.193
+[0x21be1e0] trying to save udp://233.19.187.193:5000 to omvs_out/233.19.187.193-5000.png
+[0x21be1e0] finish scanning 233.19.187.193
+[0x21be1e0] start scanning 233.19.187.194
+[0x21be1e0] trying to save udp://233.19.187.194:5000 to omvs_out/233.19.187.194-5000.png
+[0x21be1e0] finish scanning 233.19.187.194
+[0x21be1e0] start scanning 233.19.187.195
+[0x21be1e0] trying to save udp://233.19.187.195:5000 to omvs_out/233.19.187.195-5000.png
+[0x21be1e0] finish scanning 233.19.187.195
+[0x21be1e0] start scanning 233.19.187.244
+[0x21be1e0] trying to save udp://233.19.187.244:5000 to omvs_out/233.19.187.244-5000.png
+[0x21be1e0] finish scanning 233.19.187.244
+[0x21be1e0] start scanning 233.19.187.1
+[0x21be1e0] finish scanning 233.19.187.1
+$ ls -l omvs_out
+total 1960
+-rw-r--r-- 1 root root 545742 Jan 23 21:55 233.19.187.193-5000.png
+-rw-r--r-- 1 root root 477971 Jan 23 21:55 233.19.187.194-5000.png
+-rw-r--r-- 1 root root 398304 Jan 23 21:55 233.19.187.195-5000.png
+-rw-r--r-- 1 root root 574233 Jan 23 21:55 233.19.187.244-5000.png
+$ 
+-------------------------------------------------------------------------------
 
 For more detail, please run omvs --help.