The Anti Barking Device is the perfect solution for nuisance barking. Simply push the button and it will emits a harmless ultrasonic sound, teaching your dog to associate the unpleasant sound with disobeying commands to stop barking. Regain the peace and quiet that's been disrupted by nuisance barking with a push of a button! Product Features: Harmless and humane ultrasonic to deter dogs from annoying and aggressive behaviors Lightweight and portable handheld device Works up to 50 feet LED flashlight also functions as battery indicator Product Specifications Frequency: 25 kHz Sound Pressure: 130dB Maximum current: 130 mA Power: 9 V battery (not included) Dimensions: 13 x 4 x 2.6 cm Net weight: 97g