One of the very finest incubators. Universities & Laboratories are using the RX2 for those critical science and research programs. A continuously running fan delivers air a the right temperature and humidity. Humidity is adjustable. Solid state temperature control with a ten turn potentiometer for precise temperature setting. Two spirit thermometers are provided to give accurate temperature and humidity readings. See-through dome for observation on a hard plastic base. Outside water bottle allow the opening of the dome without spilling any water. Automatic turning is standard. One grid of your choice is included. Specify your grid choice with your order. Hatching Manual included.