The motor is positive and negative. For example, if the positive electrode is stretched and the negative electrode is contracted, you can change the expansion and contraction of the rod by modifying it. The push rod is by a continuous motor with a lead screw drive. The telescopic rod can only be retracted but not rotated. Temperature -10 °C to +50 °C. Standard protection level: IP54 Low noise, the noise is less than 50dB. Please do not disassemble the machine. Product features: drive objects to push, pull, climb and down. Product application: TV lift table, massage table, electric bed, chair, electric equipment, microphone type equipment, electric sofa, camera stand, camera etc. Features: This miniature linear actuator is used in industry, agricultural machinery, construction, sweeping vehicles, ships, freight and many applications., Weight: 0.21164377152 pounds, Manufacturer: Wanjorlay