1. Low noice. 2. travel length: can choosed. Lifting Column Product parameter :Input Voltage: 24VDC Maximum load: 2000/1000N Speed: 3mm / s (2000N) 13mm / s (1000N) Standard Stroke: (100,150,200,250,300,350,400) (optional) Limit switch: Built-in Frequency: S2-10min Ambient temperature: -26 ~ 65 Protection class: IP43 Safety Certification:CE/EMC+LVD Electric push-type column