The WiFi feature in the Zoll AED 3 can be very useful for customers who have several AED 3 units (especially if the units are in various locations).  The AED units can send its maintenance check data to the customer's AED coordinator's computer or mobile device.  The AED coordinator will also know right away if there is an issue with the AED unit.  The WiFi feature works only with PlusTrac (extra cost) and will shorten the stand-by life of the battery.