When the system emits its ultrasonic sound, your furry friend will understand that you want him to stop whatever he is doing. The system also has a positive tone to reward good behaviors as well as a negative tone to counter undesirable ones.
- Uses ultrasonic sound
- Range up to 30 feet
- Uses a positive tone for rewarding good behavior
- No receiver collar required
8 x 6.25 x 2.75 in.