FANZO repelente de perro de mano, dispositivo antiladridos ultrasónico de doble canal, tope de corteza para mascotas y herramienta de entrenamiento para perros[ Dual channel Ultrasound Design ] The product uses two ultrasonic transmitters, which can generate 130dB of ultrasound, which will make the fierce dog panic and keep unfriendly dogs away; protect yourself from dangerous dogs while walking, jogging, or bicycling. [ Trainer Device ] Dogs will learn to stop barking and all other unwanted behavior by associating disobeying with getting bombarded with this harmless sound. Deter unwanted behavior such as