Train your dog easily and harmlessly with the PetsWorld anti-bark dog collar. The remote control can be used by expert trainers and also first-time pet owners. The electric dog training collar can be used to help control barking with 2 effective modes: Beep Mode, Static Shock Mode (1-16 level), you can choose according to the instructions or the actual needs of your dog. Automatic protection -- an automatic protection mode to deactivate the collar if activated 7 times in 1 minute then back to work in one minutes. Waterproof collar -- That is suitable for all of your dog's indoor and outdoor activities. If you need to adjust the strap and cut the redundant part of it, heat the end of the strap with a lighter, in case it get a raw edge. INSTRUCTION: 1. Charge it before first use. 2. If you need to adjust the strap and cut the redundant part of it, heat the end of the strap with a lighter, in case it get a raw edge. 3. Don’t wear it exceeding 10 hours a day, or it may affect the dog's skin. 4. Don’t let the dog alone at first several times. 5. Not for a regular collar. 6. Check the tightness of the strap and your dog's skin regularly. 7. The ideal state is one finger’s space between the strap and dog's neck, so it can response accurately. This dog collars suits different size dogs.