Never again worry about where the pad is or if it is positioned correctly. The pressure sensor pad is sealed right inside the wheelchair seat. Durable, reinforced vinyl with steel side-stays. Fits all popular sling-seat wheelchairs. Easily identify these sling seats by the red tag sewn on the back of the sling. Unconditional, one-year guarantee. Sleek, Black color. System is shipped complete including replacement seat/alarm, alarm box, mesh mounting bag, and 9V battery. Not for use with heavy gel cushions. 6 Month Warranty.