Sanwich Outdoor Anti Barking Device, New Model Mini Ultrasonic Dog Bark Control Sonic Bark Deterrents, Dog Silencer No Bark Tool Dog Bark Trainer;

Stop Your Dog, the Neighbor's Dog or Even Multiple Dogs from Barking by emitting harmless high-pitched ultrasonic sound which can be heard by dogs as far as 50 feet away but is completely silent to human ears!

If the dog is deaf or hearing impaired, he may not react to this bark control.

Can effectively prevent your dog from barking
Can effectively prevent your neighbor dog barking
Can prevent the dog barking at a particular time
Train the puppy without barking
Prevent the dog from barking at camping

Four adjustable ultrasonic volume levels
Test -- used to verify the microphone and speaker are functional
Low -- Range-up to 15 feet/5 meters (Suggest testing indoors)
Medium -- Range-up to 30 feet/10 meters
High -- Range-up to 50 feet/15 meters

Power: 9V Battery

Modes of Operation
Turn on the Low Range setting begin use it and only increase to the Medium Range setting if the dog does not respond.
If the dog does not respond to the Medium Range, increase to High Range.
Turn to the TEST Mode to verify that your item is working properly. Do not use this Mode for normal operation. Please see the instruction to know how to test.