here is a physical description for a device for tracking medical packages which can sense temperature, humidity and geolocation: The device is about the size of a AA battery and is made of durable plastic. It has a small, built-in antenna that allows it to communicate with GPS satellites and cellular towers. It also has a temperature sensor, a humidity sensor, and a geolocation sensor. The device is powered by a small, coin-cell battery that can last for up to a year. The device is attached to See more