Pet Dog Training Adjustable Sound Silver Metal Whistle Keychain 
Description:
New Pet Training Dog Adjustable Sound Whistle.
Dog whistle with the dog (can also be used for other pet birds such as pigeons) to establish a good tool for communication and discipline.
While using this product can spread very far.Within3km can be heard.
Dog whistle will send a dog can detect sound.
Ear of dog to receive sound waves per second, 120 kHz, while the people can hear up to 20 kHz. Dog whistle can be issued in addition to the human voice can be heard outside the tube, while the sound people hear is, only dogs can hear frequencies, this frequency sound transmission is very far, so the dog can be very far away hear the sound.
The sound can be heard by human as well . please don't worry!
This Whistle can help you to train your dogs.
Size: Dog whistle is about 5.2 CM/2.09" long
Material:Stainless Steel
Package Included:
1 x Dog Training Whistle