Dogwidgets DW-3 Rechargeable Electronic E-Collar Stops unwanted bad behaviors. Features strong vibrate and shocks to eliminate all bad behaviors Safe and effective. Very humane collar, strong vibration stops dog's bad behavior 99% of the time Simple design remote control. 7 total buttons for vibrate and shocks, no need to toggle/switch buttons to deliver vibrations or shocks Fits all dogs from 15 to 100 pounds with a collar sizeadustable from 12 to 20 inches long. Best customer support. Fast customer email and phone support with 6 months replacement warranty. Buy with confidence. Please refer the User Manual attached below.