Stronger Bark Control with Large Ultrasonic Emitters: Unlike standard single-transmitter devices, our upgraded bark deterrent expands coverage by 3 times, swiftly curbing unwanted behaviors like barking, biting, and jumping. it’s safer than bark collars and more effective than dog whistles. Delivering a humane, high-performance dog training solution. Humanized ultrasonic dog bark deterrent completely liberates your dog from cruel shock collars. 100% Safe & Humane Training: Our dog bark deterrent device features dual ultrasonic frequencies (fixed 25kHz and variable 25-30kHz), emit high-frequency sound signals that effectively capture canine attention. This bark control device delivers no electric shocks, vibrations, or noise, makes no skin contact, and does not impair canine hearing. It is 100% harmless to both dogs and humans. Perfect for training at home or to stop neighbors dog bark that disturbs your peace. 65FT Control Range & Portable Size: Bark