The European style Dual Tone Whistle is made from authentic buffalo horn and is two whistles in one. One side has a high pitch tone and is pealess, the other side has a low pitch tone with a pea. You can either teach one dog two different commands for the different tones, or direct two different dogs, one with each tone. Many gundog trainers use the high pitch for the “come” command and the low pitch for “stop”, but the commands and tones used are entirely at the trainer’s discretion. A favorite with gundog trainers and tracking dog enthusiasts alike. Comes with a built-in lanyard of durable nylon string.