diff --git a/README.md b/README.md
index 6fe4452..3151266 100644
--- a/README.md
+++ b/README.md
@@ -5,4 +5,12 @@ This python tools is used to get private keys of BTC address.
 sudo python3 -m pip install --upgrade pip && pip3 install bit bip32utils
 
 Then Download latest BTC address files. 
+```
 run python3 Check.py 
+```
+
+Example: python3 -r btc.txt -o found_key.txt -t 2
+
+-r : Input file containing btc addresses
+-o : Out files to save valid keys
+-t : threads to use of server.