* On/off button * Trigger accurately by bark vibration (can not activate by other dogs barking) * Ultrasonic and audible mode selections * Audible: creates harsh buzz to stop barking * Ultrasonic: works by sending out an ultrasonic signal that only dogs can hear when activated by the barking * High / Low intensity buttons * On high intensity setting a softer bark will cause the unit to activate * On low intensity setting a more aggressive bark will cause the unit to activate * Red light working indicator * Adjustable stretch collar to fit different sizes
