Fellowes Heat and Slide Footrest, Black/Grey (8080901) 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 and energy efficient (requires only 90 watts/0.75 amps to run) Height adjusts from 4-1/4" to 5" to help relieve lower back pressure and improve posture Call 800-945-4545 for customer support.