1. Powered by 1 x 9V battery (not included) 2. Uses ultrasound to deter unwanted barking 3. 4 settings: Test (verify microphone and speaker), 1 (low range, up to 15 feet), 2 (medium range, up to 30 feet) and 3 (high range, up to 50 feet) 4. LED light displays battery level 5. Human should keep at least one arm away while using
