HERM SPRENGER Dog Training Whistle To Stop Barking – Bark Control Adjustable Frequency Silent Ultrasonic Sound Training Tool | The Original – Made In Germany

Herm Sprenger #5748100031 Soundless Training Whistle Herm. Sprenger Dog Equipment for Dog Sports, Training, and more. HS Sprenger has decades of experience in manufacturing. Its name equates to quality and history. All Sprenger products are Made in Germany with no compromises in quality, safety, reliability ease of use, and assortment. Made in Germany.
for human scarcely audible
audible range for the dog up to 400 meters
constand pitch by locking the secure nut on the adjusment screw
protection cover for securing adjustment