* impulse strength increases automatically with every barking * integrated safety function (automatic switch) * collar is automatically switched off for 3 minutes if your dog barks 15 times or more within 80 seconds * 15 impulse levels * two-colour LED display shows battery status * replaceable batteries * battery life is between approx. 3 and 6 months * test mode * adjustable nylon collar, for a neck circumference of up to 68 cm