With adjustable frequency, our dog whistle can help you communicate with your dog in a more efficient way. Advantage: Safety Dog Whistle The ultrasonic dog whistles will not hurt your dogs’ hearing, perfect for teaching your dog obedience and to learn basic skills such as sit, come, stop barking, stay, and more, so that you dont need to shout out loudly Multifunctional Use: STOP BARKING With dog whistle to stop barking, you will never need to yell at your dog and give your lungs a break! It is the best choice for you. GO AND FETCH TRAINING Our dog whistle can be used to train your dog go and fetch it when you Throw a dish or other stuff. It will be a fantastic experience for both you and your dog. CALL BACK TRAINING Hivernou dog whistle allows you to call your dog back easily at anywhere.You will never need to call your dog loudly any more. How to train your dog with Dog Whistle: 1. Adjust the pitch and blow the whistle to train your dog. 2. Notice your dogs reaction to each setting until your dog exhibits the strongest reaction. 3. Have different cues for different duration/frequency of pitches for smart dogs. For example, two short bursts mean COME and one long burst means SIT, then reward your dog with a treat. And Keep your whistle command consistent. 4. Reward your dog with a treat If it responds positively. 5. Repeat training 4 to 5 times per session and spread the sessions over a couple of days. Package include: 1x dog whistle 1x free lanyard Please note that this ultrasonic dog whistle wont make your dog understand your instructions immediately. It requires multiple training for your dog to listen your commands. Use the rewarding-positive-behavior approach to make your dog a listening and obedient friend. Pls be patient.