About this item BARK CONTROL & DOG TRAINING: Ultrasonic barking control device provides a safe and effective solution for dog training and bark control. Your dogs can be trained effectively to stop unwanted behaviors, for example, barking, digging, eating unsafe food, fighting, etc, via anti-barking device. ADJUSTABLE FREQUENCY DESIGN: No barking device adopts two ultrasonic modes: the fixed frequency (25KHZ, the most effective frequency to draw dogs' attention), and variable frequency (25KHZ~30KH, can prevent dogs from showing resistance to fixed frequency ultrasonic waves), both modes safe to human and dogs. So even if your dog adapts to one of the ultrasonic frequency, there is always the other one can be used effectively. USER-FRIENDLY DESIGN: Type-C Charging port, long battery life (standby time: 60 days) ---1000 mAh rechargeable battery, only one button, and LED indicator are ideal to travel and use. The stop barking device will be shut off automatically while long-press over 10 seconds to protect your dog from overstimulation. SUITABLE FOR ALL SIZE DOGS: The premium internal components and innovative technology regarding ultrasonic waves ensure suitable for all size dogs, indoors and outdoors no less than 16.4ft. WHAT YOU GET: Ultrasonic device, instruction, user guide, Type C cable, adjustable anti-static wrist strap, a mystery gift---Dog Poop Bags, our worry-free 18-month warranty, and friendly customer service-- any further assistance, please do not hesitate to contact us, we always here to serve you and your furry friend.