Dog Bark Collar - Vibration Magnetic Charging Waterproof Smart Barking DetectionThis bark collar is designed for no pain correction with enhanced vibration and tone technology, which helps to stop barking for small, medium and large dogs. It automatically increases in intensity the longer the barking continues. The particular triggering sensor will detect and activate only when your dog barks 1000 to 2000kHZ and 80 to 90db, which can safely and effectively filter other unrelated sounds and prevent false triggering. The collar