A single breath from the mother will immediately show the percentage of carbon monoxide attached to the baby's red blood cells. Displays the mother's CO level in parts per million (ppm) and the percentage COHb, the Baby CO will immediately display the carbon monoxide levels of the unborn fetus. Measurements are easily obtained from a single expiration and are aided by an auto-zero function when the unit is turned on. These results are then instantly displayed on the large liquid crystal display. An ergonomically designed unit of distinctive appearance, the textured handgrip encourages easy and reassuring use. Small, lightweight and molded form high impact ABS plastic for durability. 2 year warranty