diff --git a/README.md b/README.md
index 156ea67..1b40594 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
 # oss-syncd
 
-oss-syncd in Rust Programming Language
\ No newline at end of file
+monitor and sync local directory to OSS, provide history last n files
+
+* binary file diff
+* sqlite meta db
+