1. Read the user manual carefully. Know how to operate the collar before trying it on your dog. 2. Attach the collar to the dog’s neck. Make sure that the prongs touch the dog’s skin, the collar is comfortable and won’t fall off. If the dog has thicker fur, use a comb to separate the fur at the point of contact so that the product can reach the skin. 3.It is important to adjust the proper collar size, too long or too tight may cause skin damage to the dog. 4. Start Training Your Dog. Start at beep mode, then vibration mode, if the dog doesn’t respond, shock mode is the last choice. Meanwhile, start at the lowest level of every mode then slowly turn to the next level until the dog has a response. 5. Avoid leaving the collar on the dog for more than 10 hours a day. If possible, remove the collar and check the dog’s neck every 2 hours. 6. Do not tie the dog leash to this collar. Check the dog’s neck skin condition every day, if any signs of skin discomfort are found, please stop using it in time until the skin heals. 7. It is recommended to use the original charging cable to charge. But you can conveniently charge it with the USB outlet of the power bank/computer/car. If charged by adapter, please note the adapter power must be not greater than 5V1A.