Folding Bread Proofer and Yogurt Maker Ferment and Rise Bread Dough - Make Yogurt - Melt Chocolate Temperature range: 70  120F (21  49C); Typical humidity 60-80% Reinforced polypropylene body; Aluminum water tray Closed (outside dim's):18 x 14.5 x 2.75"; Open (inside dim's):15 x 12.5 x 8.5 120V only; 30-day money back guarantee; 1-year warranty