The DC 20, in combination with the Astro 220, pinpoints your dogís position every 5 seconds and runs for 17 hours. You can extend the battery life of the DC20 by changing the position transmit rate from 5 to 10 or 30 seconds, enabling the DC20 to work up to 36 hours in the field on one charge. You will know if your dog is pointing, sitting, moving or treeing. Where itís at. Where itís been. How fast itís moving and how far itís gone.
Up to 9 extra collars can be used on the Astro for a total of 10 dogs (including the collar that came with the unit)