Apnea is common in premature infants, who often lack the neurological development to breathe correctly on their own. Monitors used in hospitals the United States are power-intensive and extraordinarily expensive, leaving primary health care centers in the developing world relying on nurses to keep vigil. Our Babalung Apnea Monitor detects apneic episodes in premature infants for under $35, treats the infants as soon as apnea is detected, and alerts health care workers to emergency situations.