A smaller version called HERO Jr. was released later. Heathkit intended it for the home market, and therefore made it less complex, and more self-contained. Like HERO 1, HERO Jr. has a 6808 processor, but only 2 kB of RAM. It has onboard speech synthesis, a Polaroid sonar range sensor, a light sensor, a sound sensor, and an optional infrared sensor. Other optional components include a pair of extra batteries to double the operational time between charges, from an estimated 4 hours to 8 hours. A remote control accessory allows users to drive the robot around. It includes a motion sensor that causes the robot to croak "SOM-THING-MOVE" when it detects a source of motion.