Provides soothing heat above or below platform to promote comfort while seated. Smooth sliding track helps increase circulation in the legs & feet, while providing an alternative position to warm the tops of your feet. HeatSafe ™ power button lights up for easy, hands-free operation. Eight-hour auto-off safety feature. Energy efficient: requires only 90 watts / 0.75 amps to run. Surface massage bumps help relieve work-related stress. Width: 12 3/8"; Height: 4 5/16" to 5"; Depth: 19 1/4"; Color(s): Black.