The person cant hear me

Finally got my Ring 2 working and have an issue. Sound outside sounds choppy at times. The person outside cant hear me when I talk through the app very well. Volume is all the way up and they still have a hard time hearing me or me hearing them. Is there a fix? Does the wifi signal strength make a difference? I have an extender that is closer to the doorbell than my wireless router. Dont really want to disconnect it and send it back. Any help would be appreciated.