Dog Two-tone Ultrasonic Stop Barking Whistle

thediggitydogstore.com

$2.58 

The Diggity Dog Description:

These whistles cannot be heard by people, but they can by dogs.  Dogs don't like the sound and will do your command if there is a threat of this whistle sound.  They are easy to train not to bark with these great little wonders.  If you haven't tried this method of training it's worth a try. At this price you can get a couple so you have them on hand.  Order some today!

Type: Dogs
Item Type: Dog Whistles
Material: Stainless Steel
Model Number: /
Brand Name: Favolook