AWESOME ANTI BARKING DEVICE!! 1. This anti barking device is designed to provide pet owners with a more professional way of pet training. 2. The anti barking device is powered by a 9 volt battery replaceable battery inserted into the device. When the anti barking device detects barking up to 50Ft away, the outdoor barking control system picks up the dog bark through the built-in microphone and activates automatically. Then it sends out an ultrasound. 3. Anti Barking Device has 4 range levels, including a test mode. It has 2 LEDs to indicate whether the battery is good or bad. 4. The new anti barking device features a beautiful, well-designed birdhouse unit. HOW IT WORKS? When the outdoor bark control is within range of a barking dog, microphone pick up the sound and unit is automatically activated. The outdoor anti bark control emits an ultrasonic sound.(ultrasonic sound can be heard by dogs but is silent to humans.) Startled by the high-pitched sound, the dog should stop barking, it will associate its bark with this unpleasant noise. When the dog stops barking the ultrasonic sound also stops. FEATURES 1. Delay noisy barking with harmless ultrasound 2. Anti barking device range up to 50 feet 3.The anti barking device has four adjustable ultrasonic volume levels (including a test mode). ⇀Test - used to verify microphone and speaker functionality ⇀Low range - up to 15Ft/5m (recommended for indoor testing) ⇀Medium range - up to 30Ft/10 meters ⇀High range - up to 50Ft/15 meters 4. . Dural and weatherproof for outdoor use 5. LED light flashes for low battery indication 6.9V Battery operate PACKAGE INCLUDES 1. New Outdoor Bark Control (battery not included) 2. Manual NEED ATTENTION Please follow the instructions for all operations.