I have an iphone loaded the ihunt app and bought a Cass Creek speaker from WHolesale sports for like $45 dollars and it is loud and if you use a ipod, iphone or ipad you can use it as a wireless remote with another appp. The speaker has a 80' cord on it so if you can move it away from you. I just posted the thing about the wild dogs that came in to my caller Wed. It was crazy. I have shot 3 coyotes and had one run by so fast couldn't get a shot. It works great... and alot cheaper then fox pros.