The Power Assist Seat Cushion.

This portable powered seat cushion lowers and elevates to help you get in and out of a seat. Simply place the cushion on any armchair or sofa, sit on the elevated cushion, and press the lever to slowly lower yourself into the seat without exerting undue stress on your back or knees (Play Video). To get up, press the lever again and the cushion elevates methodically on a level plane while supporting 100% of your weight, helping you stand with little effort. The unit can be stopped at any height and its integrated handle ensures ease of portability. The foam cushion provides a soft seat that molds to your body and alleviates pressure points for optimal comfort when sitting for extended periods. The cover is machine washable. Supports up to 300 lbs. Plugs into AC. 17" L x 19" W x 4" H. (12 lbs.)