Excerpt: I just purchased the Astro and tested it for deer hound hunting. I dropped a friend off in the swamp on the river and he turned off the collar unit. 20 minutes after walking into the swamp he turned the unit back on. I picked him up right away and followed his track and actually cut him off as he headed towards the riverbank some 850 yards from where I let him out. I tested the unit;s distance by setting the collar outside my house on a bench and drove off.
Pros: No guessing where dogs are. Tell the other hunters exactly where the deer is headed.
Cons: I would like more than 12 hours on a collar charge.