D.T. Systems 190-DT Big Dog No Bark Waterproof Collar SKU 190dt Features: Newly redesigned! Smaller, more Lightweight Collar Fits medium to extra large Dogs Uses a Standard 9 Volt battery (not included) Nine adjustable levels of intensity Automatic four-second safety delay Vibration Sensor only picks up vocal cord vibrations eliminating unnecessary shock from extraneous noises or dog's tags Completely Waterproof

D.T. Systems