Enhanced Anti-Barking Technology: Equipped with three powerful ultrasonic bark deterrents, this device effectively trains your dog to stop unwanted barking, scratching, digging, and chewing behaviors. For the best results, consistent training for at least one week is recommended. Safe & Humane for All Dogs: Designed with human-friendly technology, this anti-bark device emits an ultrasonic frequency (15-30kHz) that only dogs can hear, ensuring a peaceful environment for everyone. With no shocks, vibrations, or loud sounds, it's harmless to your dogs ears, skin, and overall health, suitable for dogs of all sizes. Long-Range Remote Control & Portable Design: With a control range of up to 50 feet, this device is versatile for both indoor and outdoor use, allowing easy and convenient dog training wherever you go. Nighttime Illumination Feature: Equipped with a high-brightness, long-range flashlight, this device ensures safer walks in the dark. The independent lighting function adds visibility, helping you stay aware of your surroundings during evening strolls. Convenient USB Charging & Multi-Function Training Device: The device charges via USB Type-C and is equipped with a rechargeable battery; just 40 minutes of charging provides up to 2 hours of continuous use. Not only does it help train your own dog, but it also works to deter unfamiliar dogs from approaching you during walks, jogs, or bike rides.