diff --git a/README.mb b/README.mb
index d13967c..c4a51cd 100644
--- a/README.mb
+++ b/README.mb
@@ -7,7 +7,7 @@ AUTONOMOUS PARKING CAR WITH SENSORS
 Hardware Required:
 -Arduino Board
 -Motor Shield (Adafruit)
--Ultrasonic Sensor (HC-SR04)
+-Ultrasonic Sensor (HC-SR04) x6
 -DC Motor x4
 -Wheel x4
 -Wires