Number of heating plates: Heating material: epoxy resin board Normal operating temperature (Fahrenheit): maximum 149 degrees Working temperature range (Fahrenheit): 64-149 degrees At what temperature is the highest working efficiency (Fahrenheit): below 140 degrees Wooden board material: What materials are the inner and outer boards made of? hemlock spruce Power cord length: 3M Seat capacity: 150kg Seat size: 764 * 452 * 40mm Internal space size: 770 * 750 * 1680mm Door size: 480 * 1608mm Packaging size: Package A: 1750 * 920 * 260mm Package B: 1000 * 1000 * 330mm Package C: 1740 * 550 * 100mm