diff --git a/README.md b/README.md
index 2c3641f..00e47a6 100644
--- a/README.md
+++ b/README.md
@@ -1,4 +1,6 @@
 dynamicbitset
 =============
 
-Simple C++ dynamic bit array
+Simple C++ dynamic bit array. It is like ```std::bitset``` but its size can be dynamically set.
+
+See ds.dynamicbitset.test.h for usage.