Provides soothing heat above or below platform to promote comfort while seated. Smooth sliding track helps increase circulation in the legs and feet, while providing an alternative position to warm the tops of your feet. HeatSafe™ Power Button lights up for easy, hands-free operation. 8-hour auto-off feature. Height adjusts from 4-1/4" to 5" to help relieve lower back pressure and improve posture. Energy efficient: requires only 90 watts/0.75 amps to run. UL approved. Surface massage bumps help relieve work-related stress. Rubber feet hold the footrest in place during use.