90mm Pet Dog Training Adjustable Whistle Pitch UltraSonic Sound Black

90mm Pet Dog Training Adjustable Whistle Pitch UltraSonic Sound Black Features: Designed for dog training, the frequency produced isn't of effect on person, but very useful for dogs, it will sit up, come here, eat, sit down etc A plastic sleeve protects the adjustment area Great for recall over long distances Key ring loop included Specification: Material: Metal & Plastic Length: 90mm(3.54") Weight: 14g Package Included: 1 X Dog Training Whistle Note: 1.Due to the light and screen difference, the item's color may be slightly different from the pictures. Please understand. Make sure you don't mind before you bid. 2. Please allow 1-5mm differences due to manual measurement.