Its so hard to come up with a call that a Company can market with out having a bad name in the end, or making it wirth while to put money into and getting it back out. I think in the passed couple of years most companies have slowed on ideas because of bad names that some calls tend to end up with. The thing with the Purr call is that most use the Push Botton type calls for the Purr. I' m sure there are ideas out there just coming up with them is another thing...BT