2 Minute Update Rate - The Astro DC 40 also has a new update rate that is designed to extend battery life. The Update Rate is the time between location info being sent from the collar to your hand held receiver. The quicker the update rate the more information you have on what your dog is doing.
Previous generations of the Astro have allowed update rates of 5 seconds, 10 seconds and 30 seconds. The DC 40 now has a 2 minute (120 seconds) option. This longer update rate is designed for the dog owner that wants the longest possible battery life (48 hours) and is willing to sacrifice location detail to get it.
With a longer update rate you will not know exactly were your dog is all the time, but you will be able to get close to him when you are trying to pick up a lost dog. Once you are in the general location of the last update, you wait for the next update and you will know exactly where your dog is at that point.
This feature isn't for everyone and it limits the amount of information you will get about what your dog is doing and where he is doing it. It is designed for the folks that want the longest possible battery life.
The "2 minute update" feature is only available in the DC 40 collar, but users with older 220 Astro hand held can upgrade their software and get this feature by adding a DC 40 collar to their system.