These sounds will only work on FOXPRO UNITS ONLY! Please be sure to check if your call will hold 16(b) or 24(b) sounds. You have to use the Foxpro Utility Software to upload the sounds to your Unit. All sounds have a 24 Hour Expiration and 2 attempts per sound. DO NOT download to a phone only to the computer you are going to use to upload your call. DO not SHARE or FORWARD your email they will not WORK.