I would also recommend buying one that is heavier than what you need to reduce the stress on the motor and has a top manual access. I had transferred a few year old power jack from the old trailer(600-lb), 2500# rating to the new crossroads(1100-lb). Within one year it just up and died when I was re-hitching to come home. Of Course the handle was 2-feet long(a u-bend in the middle, side access port) and I could only turn about 1/2 turn before hitting the tailgate. So, a quick stop at my rv store on the way home to purchase a 3500-lb unit and had it changed in the parking lot in about 10-minutes. So, far after 4-years this jack is still going strong.
Edited by: gossamar
2015 Rushmore Springfield
Disc Brake upgrade, Goodyear G614 tire upgrade
RV FLEX-ARMOR roof, Mor-Ryde IS suspension
2017 F350 Dually 4x4 6.7 Bronze Fire