GLB Green Level Berlin Ultrasonic Dog Repellent Black

WHAT IS IT? : Dog repeller by ultrasound from 22 to 25 Khz. Ultrasounds are waves that people do not perceive and cause discomfort in dogs. By associating that noise with a nuisance they do not approach, ULTRASOUND: 3 powers: 1) Stable and continuous frequencies. 2) Wave frequencies. 3) Frequencies with irregular intervals. It is recommended to use all of them so that the dog is puzzled, FEATURES: Hand size and easy to use. The red light will flash at less than 15% power. Recharges with USB (included), SOUNDS - includes sounds in the form of an alarm but work independently of ultrasound and its use is optional. That is, it is a complement to ultrasound, DO NOT BUY IF - you will use it with dogs trained to attack. Do not buy if you use it with deaf or older dogs. Do not buy if there are walls or obstacles. Do not buy if you use it long distance or if there are several dogs.