Ultra Sonic Dog whistles help you train your pets effectively。 Material: Quality stainless steel and strong black lanyard。 Package includes : 1 x dog whistle。 How to train your dog with a dog whistle: 1. Prepare some treats, and lead your dog to a lawn, or somewhere quiet. 2. Adjust the pitch and blow the whistle to train your dog, continue testing until your dog responds. 3. Notice your dog's reaction to each setting until your dog exhibits the strongest reaction. 4. It is best to train 5-6 times per session and reward your dog with a treat If it responds positively. 5. Some tips: "Don't move" ------- Two short sounds, "Sit down"--------- one long and one short, "Over"--------- Two long sounds. How to adjust the frequency? Instructions: 1. Remove the Anti-loss Cover. 2. Adjust Frequency by turning Screw Rod Inward or Outward Until you notice a positive reaction from your Dog. 3. Once correct frequency is met, lock the nut. 4. Insert Whistle Back into Dust Cover and Use. 【Professional Ultrasonic Dog Whistle】: You can use different flute methods to specify commands like "don't move", "sit down", and "come". For example: "Don't move", "Two short beeps", "Sit down", "One long and one short". Please keep your whistle consistent and reward your dog when he does it right. 【Adjusable Frequencies】: Easily teach your dog unrestricted commands by adjusting different ultrasonic frequencies. You can loosen the sonic adjustment screw while blowing air from the air inlet, turn the adjustment lever to adjust to the best pitch. After turning the adjustment lever, tighten the sonic adjustment screw. Notice your dog's reaction to each setting until your dog exhibits the strongest reaction. 【Dog Whistle to Stop Neighbors' Dog Barking】: When your dog or neighbor's dog keeps barking, gently blow the dog whistle, the ultrasonic frequency emitted by the dog whistle can easily attract the dog's attention and stop barking. The dog whistles can ensure that they obey basic skills, like sit down, stop barking, lay down, up. 【Anti-Loss Whistles】: The silent dog whistle body is made of safe stainless steel, train your dog without any health issues, it won't hurt your dog's hearing during training, know you will hear it too. In Addition, your pet can hear the Ultrasonic whistle up to 200 meters away and make sure your dog doesn't get lost! 【Training NOTE】: Dog whistle training will not make your dog understand your instructions right away. You will need to train your dog multiple times to obey your commands. When the dog is 3 to 7 months old, training will be more effective using methods of rewarding positive behavior. With patience, your pet is on its way to becoming more obedient than ever before!