The NBA Gametime Pro uses a retro reflective sensor to score the balls as they pass through the hoop. The net sensor has two indicator LEDS on it, the green represents the power to the sensor and the orange will light when the sensor is blocked. There is a sensitivity adjustment located on the same side of the sensor as the indicator lights, turning the screw clockwise will increase the sensitivity and counter clockwise will decrease the sensitivity. When adjusting the sensor placing your hand halfway between the front and the back of the hoop should trigger the sensor.