Easy Training Dog Whistle - Use the dog whistle to stop barking instead keep yelling pet's name, ultrasonic sound training tool to teach your dog unlimited commands such as recall, sit, come, stop,, stay, and toilet training. Safe Dog Whistle - Use Silent Bark Control for dogs stopping useless barking, although ultrasonic sound isn't "loud", it's loud enough for dogs to hear, it's easy to catch dogs' attention by blow the whistle, not hurt your dogs ears ANTI-LOSS & SAFE DOG WHISTLE - dual anti loss features with special lock nut & cover with free lanyard. Never worry about the loss or misplace of the dog whistle, to anywhere you'd love to. Our dog whistle designed reasonable small size and made of premium stainless steel material, convenient to have it and long lifespan. Whistle sound is not so clearly for humane but is enough for dog. High quality Dog Whistle - Our dog whistle designed reasonable small size and made of premium Colour: Black material: metal Package Contents: 2x whistle Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.