1. The push rod cannot work continuously for a long time. The operating frequency of the push rod is 10%-20%. If there is a short-term continuous use, the maximum number of times of expansion and contraction in a day cannot exceed 200 times 2. The push rod has a built-in limit switch. End to end (extend to the end and retract to the end) automatically stop, and stop when any power is cut off in the middle, the push rod is controlled by the positive and negative pole exchange (the positive and negative pole push rod extends, otherwise the push rod retracts). The two wires have no distinction of positive and negative poles. If there is no response after connecting, please connect them in reverse. 3. The stroke of the push rod is not adjustable. It has been set at the factory, and the internal limit switch is welded up. If you want to adjust it, disassemble the push rod and re-weld the limit switch, which is more troublesome. This operation is not recommended. 4. After the putter speed is selected, the putter speed can only be adjusted by adjusting the voltage. At this time, reduce the voltage and reduce the speed. Welcome and I wish you a happy life, my friend., Manufacturer: DCDCD