LEGO+Mindstorm+Ev3+Ultrasonic+Sensor+45504+Distance+Ranging for sale online | eBay
Amazon.com: LEGO MINDSTORMS EV3 Building Set Includes 3 Interactive Servo Motors, Remote Control, Improved And Redesigned Color Sensor, Redesigned Touch Sensor, Infrared Sensor And 550+ LEGO Technic Elements : Toys & Games
Amazon.com: LEGO 45506 Mindstorms Color Sensor for Building Game Suitable for Children Over 10 Years Old Grey : Toys & Games