40w, pro incubator, digital display shows temperature, humidity, & days to hatch, incutek heater is fast & accurate, heating to factory pre-set temperature of 100 degrees Fahrenheit within minutes, days to hatch count down, set at 21 days & adjustable, hi/lo temperature alarm flashes when outside of range, includes fan kit & automatic egg turner, large viewing windows for observation, additional probe thermometer included, durable outer plastic shell protects the incubator.