The dehydrator comes assembled state for added convenience. Nesco American Harvest Square Dehydrator and Jerky Maker: * Square design allows jerky to be dried flat and evenly - no angling them to fit a round surface * 200 more square inches of drying space - 40% more than comparable round dehydrators * Nesco food dehydrator and jerky maker includes 4 trays and can expand to 8 * Trays are break-resistant and dishwasher-safe * 700-watt motor and 2400 rpm fan provide results in hours, not days * Nesco food dehydrator and jerky maker"s Converga-Flow drying action ensures fast, even heat distribution; no need to rotate trays * Adjustable thermostat for consistent results * Bail handle for easy powerhead removal