This product is a professional Training Whistle. It will provide convenience during silent training, recall and bark control of pet dog. You can adjust the frequency of the whistle so that your pet follows different . Lightweight and compact, easy to carry around, can be carried in a backpack, pocket, convenient and practical. Features -Color:Multi -Material:Stainless steel -Size:5.30X0.90X0.90cm/2.08X0.35X0.35in - Made of stainless steel which features with stability and durability, very hard and smooth for usage. - This dog obedience training whistle is an tool for gaining your pet's cooperation through positive reinforcements. - Notice your dog's reaction to each setting until your dog exhibits the strongest reaction. - Loud sound, also suitable for outdoor survival, sports competition, etc. The is . - It can be a practical and thoughtful your friends with dog at home, and they will be very happy. Package list: 1 Whistle Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!