-Newly redesigned Digital System with Micro-processor -Adjustable Collar fits small to large dogs. -Ni-MH 4.8 Volt Rechargeable Battery System -System delivers 1/2 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 -1 year warranty