AmeriGlide's Universal 400 PR is a heavy-duty mobility vehicle lift with Powered Rotation. "Universal" means that the lift is a heavy duty scooter lift, or power wheelchair lift. "400" means that this mobility vehicle lift can lift up 400 pounds safely, great for large scooters and power chairs. Finally, "PR" stands for Powered Rotation. This means that the lift has two motors, one to lift your scooter or power chair off the ground, and the other to swing it into place without any assistance on your part. Even with the power-rotating arm, this mobility vehicle lift only requires 30 inches of headroom to load. This mobility vehicle lift also offers an optional long-lasting battery pack for the ultimate in convenience.