✔Heavy Duty - The alloy-steel shaft accompanied by metal gears allows it to push and pull up to 330 lbs.It will be great to use the actuator with our controller, which helps to control your actuactor to Forward & Reverse. | ✔Features - Aluminum alloy housing, IP54 rated protection sealed against dust, water, and corrosion suitable for outdoors use. Internal limit switch, automatically switch off when it reaches in case of the motor idling. | ✔Quiet & Comfortable - move at 5.7mm/s, silent and stable, make sound lower than 50db, suit for hospital and massage. Built-in safety lock, stop at any position in the stroke. | ✔Safe - over current protection, overload protection, over-voltage protection, over-discharge protection, short circuit protection, shock protection | ✔Quality Assurance - We Promise:100% money back guarantee. If you have any problem with your item, simply contact us with your order ID ,we will reply within 24h,and you will receive a full refund or replacement.