We have tested thousands of pet dogs and proved that this collar is very effective in training pet dogs. After using it, your beloved pet can quickly understand your instructions. This product can effectively prevent pets from barking, biting and other bad behavior. Choose the most suitable model and upgrade it according to your needs and your dog. 1000M Remote Control & Lock Button: The barrier-free direct range of our product is 1000 meters, you can easily train your dog in the yard or park. A safety lock button prevents misuse or manipulation of the remote. WATERPROOF & ADJUSTABLE COLLAR: The receiver is IP67 waterproof, which means your dog can swim or shower with the collar on. This dog training collar is safe, comfortable and effective for pets over 5.5 lbs. The collar length is adjustable from 16cm to 62cm. Rechargeable Function Frees You From Battery Trouble: Equipped with a high-performance lithium battery, it can hold a full charge and can be used for about 20 days with only