Dog Training Collar, Rechargeable Waterproof Collar Receiver Training Devices with Beep Vibration Dogs Pet Trainer, 2 in 1 Safe Working Mode Collar mini projector NO SHOCK The Rechargeable Spray NO SHOCK The Rechargeable Spray Bark Collar has no electric shock and is a very humane design 3 acre to 496 acres Rechargeable and waterproof collar with beep shock 5 levels of static correction to match dogs with different sensitivity A full stimulation lasts 20 seconds at a time The stimulation was limited to 3 times to prevent overstimulation All functions are integrated in the collar the behavior of the dog is trained outdoors Conversion function: The signal can be converted to A dog or B dog