When teamed up with the Astro® 220, this system will have you hunting in no time. The DC 20, in combination with the Astro 220, pinpoints your dog’s 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.