HOW TO TRAIN YOUR DOG? : Each time you use different flute methods to specify the commands such as Do not move, Sit down and Come. For example: "Do not move" "Two short sounds" "Sit down" "One long and one short". You can easily teach your dog unlimited commands by adjusting the different ultrasonic frequencies. Please keep your whistle command consistent, when your dog does it right, give him a snack reward, approach to make your dog a listening and obedient friend. PROFESSIONAL DOG WHISTLE : You can adjust the pitch to get the right frequencies, loosen the sonic adjustment screw while blowing the air in from the air inlet, turn the adjustment lever to adjust to the optimum pitch. After the adjustment lever is turned, tighten the sonic adjustment screw. This dog whistle can be used on any common breed of dog. SAFE DOG WHISTLE: Our silent dog whistle is made of durable stainless steel, training your dog without any health concerns, it doesn't hurt your dog's hearing during training sessions, please to know you will hear the sound too. ANTI-LOSS DESIGN : Our dog training whistles come with a high-quality lanyard and special lock nut & cover, it allows you to take this dog whistle to anywhere without worrying about losing them. Issue commands and gets in touch with your dog whenever needed. ENJOY DOG TRAINING : Your pet can hear the dog whistle up to 25 meters away even if they can't see youcomplete training freedom with poodles, sheep, rottweilers, huskies, and other breeds. Dog whistles can ensure that they obey basic skills, like sit, paw, lay down, up.