diff --git a/mouse/record.py b/mouse/record.py
index aec52dc..1ed72e5 100644
--- a/mouse/record.py
+++ b/mouse/record.py
@@ -59,6 +59,13 @@ def main(*argv):
     parser = argparse.ArgumentParser(
         description="seconds before and after lever is pressed."
     )
+    parser.add_argument(
+        "-p",
+        "--port",
+        type=int,
+        default=27,
+        help="GPIO port of trigger"
+    )
     parser.add_argument(
         "before",
         type=int,
@@ -83,7 +90,7 @@ def main(*argv):
     z = x + y
 
     # sets up trigger event for the recordings, i.e., GPIO 27
-    trigger = Trigger()
+    trigger = Trigger(args.port)
 
     with picamera.PiCamera(framerate=90) as camera:
         try: