Humane Bark Control System Is
Effective Indoors or Outdoors!
Because the unique Bark Free Control system needs no collar receiver, it works on your own dog; or a neighbor's; to stop annoying barking. Each time a dog barks within 25 feet of the receiver, a correction tone sounds. You can adjust the frequency to select an ultrasonic sound that humans can't hear but dogs can, or choose a sound that's audible to both. You can also adjust the unit's sensitivity to control how loud of a bark will trigger the tone.
12 V DC unit may be wall-mounted indoors or out, and comes with a 50 foot extension cord, 110-120 volt, U.S. Mounting bracket and protective vinyl shield (for outdoor use) are also included. This is the easy, humane and effective way to stop problem barking. Unit measures 4-1/2" W x 1-1/2" D x 5-1/2" H.