improvements in an abandoned baby , infant , child or animal alter system is disclosed . when a child or animal is being transported with a driver in the vehicle , the driver will generally maintain a comfortable temperature in the interior of the vehicle . the temperature and temperature changes are monitored to determine that a child or animal is unattended . the monitor is coupled with a connection in the car , a seat belt of a baby seat or integrated into the baby seat . integrating the sensor with a seat belt or buckle provides a switch for operation of the sensor . the signaling system can be integrated with the light , horn or alarm or can be connected to a cellular network , wi - fi or other radio communications system to send a notification that a baby , infant , child or animal has been left and secured in a vehicle and needs attention .