1. 3.4x Faster Behavior CorrectionBark guard Pro utilizes SilentSync Technology, that taps into your dog's natural sensory triggers to help interrupt the barking reflex loop, breaking bad habits like barking, chewing and chasing faster. Providing faster behavior correction, creating a calmer, more polite dog in just minutes a day 2. Three Modes for TrainingThere are three distinct modes for Bark Guard for Dogs to help with training. Each mode is designed to deal with specific behaviors such as excessive barking, digging, biting, or jumping, effectively correcting your dog's bad behavior 3. Builtin LED Makes Night Walks EasyEnjoy a worry night walk with the Bark Guard Dog Behavior Correction Device which has a builtin LED flashlight. This powerful feature lights up your path and ensures the of you and your pet during night walks. The device supports two different ultrasonic modes, fixed frequency and sweep frequency, suitable for different dog breeds 4. 50ft Coverage Fast USB ChargingThe bark guard has a coverage range of up to 50 feet, ensuring effective behavior correction even at a long distance, and a highcapacity 800mAh rechargeable battery that can be used for up to 30 days on a single 45minute charge. The Dog Bark Deterrent Device does not require constant charging, so you don't have to worry about battery issues during outdoor activities