NAWTOR QZC Super Ultrasonic Dog ChaserTraining Dog Banish Dog MachineStop Animals Attacks Aggression

Vivian Emits a high-pitched sound pulse that's inaudible to the human ear but highly irritating to dogs., Ultrasonic wave reaches up to 125db, Effectively stops aggressive, barking and threatening dogs., Fits in pocket:Protect yourself while walking, cycling, jogging, skateboarding, etc. with this handy device., 100% safe to humans and harmless to dogs :Completely safe and does not harm dogs, In normal situation, it can be used as a normal flashlight to illuminate at night.