The Uplift Premium Seat Assist is powered by a hydro-pneumatic gas spring and uses no batteries or electricity. Weighing just 9 lbs., this lifting seat is highly portable with a built-in carry handle. Patented LeveLift Technology provides a gentle, safe lift without pushing you forward. It activates automatically as the user stands, lifting up to 70% of their weight up to 350 lbs. Great for use at home or away, the waterproof cover and memory foam cushion ensure years of comfort. Stand without assistance using this premium portable lifting seat.