Recommended training steps: When a dog has bad behavior: 1. Use the Beep mode to warn the dog with sound; 2. If the dog does not react, use the Vibration mode; 3. The Vibration mode can have a good training effect for some dogs and stop their bad behavior. If the dog does not react to the vibration, briefly use the electric shock mode (the intensity is adjustable, which is completely safe for the dog). After receiving the different training warnings, the dog can stop its bad behavior every time it hears the sound warning. Generally, you will not need to switch to vibration or electric shock modes again. 100% waterproof receiver. It works even if it is submerged in water, allowing your dog to swim or bathe freely with the collar. 800 Meters Range The remote training collar uses RF434Mhz frequency to provide a range of up to 800 meters, Easily train your dog in the park or yard. Suitable for all dogs. Durable and adjustable TPU collar (16-62) able to fit small and medium dogs.