diff --git a/README.md b/README.md
index fb346f4..de55011 100644
--- a/README.md
+++ b/README.md
@@ -1,2 +1,15 @@
 # Rusty-Rover
 a simple host discovery program written in rust!
+
+# Usage
+-r target a single range given with commandline arguments.
+
+-f read a text file with ranges, one range per line, and scan them all.
+
+-o save the output to a file.
+
+rrover -r $ip_range to scan a single range
+
+rrover -f $path_to_range_file to scan a file of ranges
+
+NOTE: ranges should be in cidr notation.