Inhibits nuisance barking with adjustable levels. Features Three correction modes, each with six levels of Static Correction that automatically adjust to your dog's temperament The most reliable bark detection technology available Low battery indicator Uses PetSafe RFA 67 Manual and video CD included Collar Specifications Height 1 Width 2 Depth. 75 Weight 1.5 oz Uses medium Contact Points One black plastic sensor probe, center Battery is available in the accessory pack RFA 118 5 position turn switch General Information Sensor probe cannot be removed or adjusted 18 total levels of correction Progressive correction feature increases correction to next strongest level in current setting only if dog continues to bark Safety time out will shut off the correction for 3 minutes if the dog barks more than 15 times in 50 seconds Uses vibration sensor and microphone to sense for barking 3 settings, High, Medium, and Low with 6 levels of correction per setting Cannot attach leash to collar Must be fit properly or may not function reliably Not recommended to use for more than 8 hours at a time Dog should be at least 8 lbs. This bark control collar does not beep Operating Guide.