Product Description: Dog Whistle Stops Barking, Teaches Recall and Tricks: Yes, weve developed a better dog whistle to stop barking and help train your dog. More frequencies mean better results for any pooch, at any ageAdjustable Frequency + Frequency Lock: Yes, our dog whistle has more frequencies. Proprietary precision grinding results in a finer frequency range, Dimensions: 5.5x0.8 cmMaterial: stainless steelColor: SilverPackage includes: 1 *Dog Whistle Note:1. Due to manual measurement, please allow a small error. Please make sure you don't mind before bidding2. Colors may vary depending on the display. Please understandNote:Hello, please pay attention to your shipping address when purchasing products. If your receipt information (such as name, street, house number, doorbell/email without name, etc.) is incorrect, the order will not be delivered correctly