my astro would track up to 550 yards go out. i had to get 120
yards from dog to get back tracking. if this happens or other problems
you can reboot. it fixed my astro. turn off/push/back/menu/and scroll out. hold these down and turn power on and hold all 3 down for 5 sec,s or more. you will see on screen add collar. you will need to inter
dog again. every one may know this. just wanted to pass on.tenn
coon hunter. my god bless.