Harris Farms, LLC is a Nolensville, TN-based company that stands firmly on three-decades of serving customers with America's Choice in Poultry, Farm and Ranch Supplies. The Harris Farms family of brands has earned a well-deserved reputation in the poultry, farm and ranch industries by consistently delivering on their unwavering pledge of excellence in product-quality. With each purchase of the Harris Farms and Free Range brands, you are assured of top-quality products and supplies that are rigorously field-tested to ensure long-lasting value. Automatic Egg Turner Accommodates 22 Chicken Eggs The timer will start a countdown from 21 days immediately after you plug the unit in and will automatically stop 3 days before hatching. Preparing for Hatching, the Egg Tray When the countdown reaches 3 days before hatch, and the auto turner stops, the egg turner indicator will say OFF. This is a reminder to remove the egg turner from the incubator base. Controls Humidity for Optimal Hatching Day 1 until 3 days before hatch day: Fill first half of the water pot marked "A", wait for 3-4 hours for the humidity to fully stabilize, then adjust the air vent knob to achieve humidity approximately 52% which is suitable for poultry Last 3 days before hatch day: Increase humidity by removing the red plug and adding both halves of the external water pot, wait for 3-4 hours for the humidity to fully stabilize, then adjust the air even knob to achieve humidity approximately 72%