How It Works When you flick the switch to ON position, the product starts to work, the indicator light will flash blue every 5 seconds interval during the standby period, when the switch is flicked to OFF, the product is off.
The ultrasonic sound have 3 frequencies.
In general, the level 1 frequency works for small dogs, the level 2 workds for medium dogs, the level 3 works for large dogs. But it's better to try different frequency to get a most effective frenquecy for dogs.
Package Include:
1x Anti Bark Device
1x USB Cable
1x User Manual