1145DT Battery: Standard Features: -Mini no-bark dog collar.-Adjustable collar fits small to large dogs.-System delivers 0.5 second corrective stimulation.-Automatic three-second safety delay.-Built in magnetic on/off system.-Digital numeric display shows 8 different intensity levels.-Vibration sensor only picks up vocal cord vibrations eliminating unnecessary shock from extraneous noises or dog’s tags.-Data memory system saves last used intensity setting.-Completely waterproof. Specifications: -Replaceable 6 volt battery.-Optional Ni-MH 4.8 volt rechargeable battery system.