Foot restraint and heel cups - lateral and front to back adjustments provide feet and ankle alignment. Knee blocks - lateral and height adjustments and two positions of depth maintain hip-knee foot alignment and assist in abduction. Curved rigid posterior pelvic stabilizer - swings open for easy transfer of child. Adjustable for exact fit. Trunk support - height adjustable. Secured with hook & loop strap and a secondary buckle for safety. Tray - horizontal positioning device is angle and height adjustable. Four 4" wheels with locking casters. Two year limited warranty.