We tested thousands of dogs and have proven that this collar is very effective for dog training. After use, your beloved pet can quickly understand your instructions. This product can effectively prevent barking, biting and other bad behavior of pets. Effective dog training collar: has 4 training modes: vibration, shock, light and sound. Choose the most suitable model. and set it to; level to suit you and your dog. 800m Remote Control and Button Lock: With a direct unobstructed range of 600m on our products, you can easily train your dog. dog in the yard or park. A secure lock button prevents misuse or manipulation of the remote control. Waterproof and adjustable collar: the receiver is waterproof up to IP67 which means your dog can swim or shower with the collar on. This dog training collar is safe, comfortable and effective for pets over 2.5 kg. Rechargeable function eliminates worries about your battery: equipped with a High-performance lithium battery, it can keep a full charge,