Zowaysoon 12V Electric Linear Actuator 100m/4inch Stroke 1500N DC Motor Linear Motion Controller with Limit Switch Stroke length:100mm(4inch) Voltage: 12VDC** Noise Value: &gt;65dB Load/Thrust/Force Capacity:1500N =150kg(330Ib) The low noise design, noise level below 65 dB Duty Cycle: 25%** Protection class:IP54