Anti Bark Device for Dog Ultrasonic Stop Barking Deterrent with LED Flashlight 【Triple Sonic-Core Technology】 Triple ultrasonic emitters deliver 3X sound wave density (25-40KHz) for faster behavior correction. Safely interrupts barking/aggression without shock collars. 【Handheld Ultrasonic Dog Trainer】 A professional tool for training and bark control, emitting safe sound waves (25-40KHz) to attract dogs' attention and prevent unwanted behaviors. Adjustable sound waves repel aggressive dogs, making cruel shock collars unnecessary. 【Smart LED Display & Safety Lock Button】 The smart LED display allows you to see the safety lock status, battery percentage, flashlight mode and ultrasonic emitter mode. The safety lock button can effectively avoid accidental touch. 【Portable & Effective Range】 Compact size for easy portability, one button operation can drive dogs with a 30-foot range for effective bark prevention. 【Long Battery Life】 2500mAh high-density cell delivers 6 months standby / 120hrs continuous use – 3X capacity of regular models. USB-C fast charging. 【Unique Dual Frequency Modes】 Low/high-frequency modes for training and immediate behavior correction. 【Dual-mode LED flashlight】 Steady Beam for illumination + Strobe Mode for emergency signaling, walking in the dark, safe and worry free! Specifications: Working Principle: The ultrasonic dog repeller emits 25KHz waves (audible to dogs 15Hz-50KHz), which don't harm but deter barking and aggressive dogs. Target Audience: Effective for large, fierce, and domestic dogs over 6 months. Less effective for puppies <6 months, seniors >8 years, or pets due to reduced hearing sensitivity. Applicable Distance: Max 30 ft, best at 18 ft. with no obstacles, as ultrasonic waves can't bypass barriers. Applicable Environment: Works best in quiet settings. Noise from cars, busy streets, or loud speakers can interfere. Safe & Humane: An alternative to shock collars, using ultrasonic technology for gentle, non-harmful correction. Usage: Aim at the dog, press, and hold the ultrasonic button. Switch gears if needed. Color: Orange Power Source: Battery Powered Controller Type：Button Control Material: Plastic Input Voltage/Current : 5V/2A(DC) Working sound wave: 25KHz-40KHz Product Dimensions: 4.53*1.65*1.2inches Item Weight: 0.177kg Recommended Uses For Product: Dog training, stopping barking, chasing away vicious dogs Package Includes: 1 x Triple Sonic-Core Dog Repeller 1 x USB-C Charging Cable 1 x User Manual