A TOF Laser Range Sensor is a 500HZ laser distance sensor that measures the distance to an object by calculating the time of Flight it takes for a laser pulse to travel to the target and back.
500 Hz indicates that the lidar tof sensor can take up to 500 measurements per second. Such a high measurement rate is useful in applications requiring real-time data or rapid scanning, such as in robotics, autonomous vehicles, or industrial automation.
100m is the maximum range the tof laser sensor can measure. It means the long range tof sensor can accurately determine distances up to 100 meters away from itself.