It is used to adjust the total working time of the motor. Turn clockwise to increase, counterclockwise to decrease. The total time can be 5 hours minimum 0 to 10 seconds and maximum 90 seconds. It is used to adjust the output force of the OPEN motor to ensure safe use. Turn clockwise to increase, counterclockwise to decrease. For motor output, for adjusting clock veso rotation, counter - clock rotation o. Suitable for use with sliding door opener motors; not suitable for other openers; it requires a transformer to power it or use a backup battery or solar system. Applies to motors with mechanical and magnetic limit switches; it does not apply to motors without limit switches, Manufacturer: CUIchwWE