Features: For dogs 10 pounds and up Bark recognition; distinguishes bark from surrounding noises 6 intensity levels Non-electrical stimulation warning 2-hour rapid charge Lithium Polymer batteries LED battery life indicator Fully waterproof Charger included Tri-Color LED Battery Life Indicator Sound Recognition Sensor Medium Output Receiver Pager Vibration Warning Prior to Stimulation Fits dogs as small as 10 lbs (receiver weight: 4.0 ounces Manufacturer one year limited warranty