NPS Alpha Dog Behavior Trainer Barking Control Device - Never used - open box Dog Bark Deterrent Devices Rechargeable Anti-Barking Device for Dogs 35ft Long Range Ultrasonic Correct Your Dog's Bad Behavior at the push of a button. An alternative to bark collars, shock collars, and bark whistles—painless and faster at correcting your dog’s behavior.3 The Ultrasonic Dog Trainer is designed for effective training and bark control without the pain of shock collars. It emits ultrasonic waves to reduce barking, digging, scratching, biting, and jumping on furniture. 3 Safe & Effective Training Modes: Features a 25kHz fixed frequency that is undetectable to humans but effective for dogs. Multi-Function & Easy Operation: Not only trains your dog, but also deters aggressive or unfriendly dogs during walks, jogs, or bike rides, keeping you and your dog safe. Portable & Long-Range: This compact device has a 35ft control range, making it perfect for indoor and outdoor use. Includes a wrist strap for added convenience. Fast Charging & Long Battery Life: Equipped with USB fast charging, it fully charges in just 1 hour and lasts up to 60 days. Spend more time training and less worrying about frequent recharging.