1. Anti Barking DeviceThis anti barking device for dogs is designed for effective training, serving as a alternative to traditional bark collars, vibration collars, and dog whistles. Ultrasonic technology corrects bad behaviors painlessly and faster, making training easier and more efficient. 2. Training ExpertWhether correcting unwanted behaviors or conducting daily obedience training, the three modes of this bark deterrent device meet all needs. This antibarking device humanely addresses barking, biting, digging, or jumping—eliminating coercion or punishment for a positive training experience. 3. LED FlashlightEquipped with a builtin LED light, these dog deterrent devices illuminate nighttime walks/training. Flash mode effectively deters aggressive or unfamiliar dogs approaching, combining safety and functionality for home/outdoor use. 4. Safe and EffectiveEmits 25kHz ultrasonic waves (inaudible to humans, effective for dogs) with 50ft range. This ultrasonic dog bark deterrent requires no vibration, noise, or physical contact—100% safe for all dog sizes, ensuring gentle training.