About the Med-Lift 3555 Lift Chair: The 3555 is a heavy-duty 2-position lift chair that comes with a low voltage motor and a 500 pound weight capacity. The seat is a classic button-back design. Arm and head covers and a magazine pocket come standard on the 3555. The 3555 has an extra heavy-duty hardwood frame, steel lift mechanism and scissors hardware, and a super strong uni-constructed seat-back assembly. The seat and back springs are heavy-duty and the seat and arms have extra foam for increased support.