Just finished the 2015 version of the push button yelper! The 2014 model had some inconsistencies in the yelp and purr and those are now fixed in the new version. I am offring an unheard of thing in the call business - if you want me to upgrade the 2014 version of your call so that inconsistencies are gone, send it back to me and I will upgrade it and return it to you for just the cost of you shipping it to me, the rest is on me! Take a look, no one builds the call like i do, no one warranties it like I do! Just click on this pic and it will take you to the yelper page!