Double Tube：Double tube, clear and loud vioce, the sounds can be heard far away in an emergency. Suitable for bird flying training, or pet dog training, increase the interaction with lovely pet.Good Training Whistle：Our dog whistle can be used to train the dog basic obedience, small trick, and correct the bad behavior; Scientific method of training your pet safely and easily. Perfect training whistle to teach commands such as come, sit, stay, stop barking, and more.Easy to Carry：Comes with key ring, easy to carry anywhere and anytime. You can keep it close at hand while training your dog and never worry about it being lost or misplacing.Quality：It is designed with reasonable small size. The whistle is made of high quality aluminium alloy material, safe, anti-rust, sturdy and durable for long time use. Safe to PetAlthough ultrasonic sound isnt loud , its loud enough for dogs to hear, its easy to catch dogsattention by blow the whistle, will not hurt your dogs ears.Product Quantity: 1 Piece Product color: gold Product size: 4.8*1cm