Slide Switch with On indicator light. 3 automatically controlled heat settings. Wet proof pad construction. Removable, hand washable, cloth cover with stays and ties. Sponge pad for moist heat. 70% larger than standard size pad. Cara's Moist/Dry Heating Pad with Slide Switch is recommended for use whenever heat therapy applications are desirable for personal comfort, or as recommended by you physician for the relief of pain. Color of heating pad cover in photos may not indicate color of cover in package.