Ultrasonic Dog Repeller - Function and benefit: Uses ultrasonic waves in the 25 kHz to 40 kHz range to interrupt the barking reflex and reduce barking, chewing, and chasing without harming the dog. Designed for humane behavior management. - Built-in LED light for safety: Two bright LED lights illuminate your path during nighttime walks, increasing visibility for you and your dog. - Long-lasting battery life: Built-in 800 mAh Li-ion battery. A 45-minute charge provides up to 30 days of use, delivering dependable performance when you need it. - Portable and durable design: Made from high-quality ABS material, sturdy and durable with an ergonomic handheld form. Compact size fits easily in a pocket, bag, or car for convenient use anytime. Use scenarios - Nighttime walks: Deterrent to disrupt barking and reactive behaviors in low-light environments, helping you maintain a calmer walk. - Outdoor training and park visits: Effective during training sessions or in public areas to reduce barking, chewing, or chasing around other dogs. - Travel and everyday carry: Lightweight and pocket-ready for quick, humane behavior management wherever you go.