The Numaxes Anti-Bark Collar Canicalm is an excellent choice if you´re trying to teach your dog to bark less. How does it work? As soon as your dog starts to bark the device will emit six successive sound signals. If your dog starts to bark again within the next 30 seconds the device will give out two seconds of continuous sound combined with vibration (long or short pulses depending on the chosen setting). Product features Suitable for all dogs Barking recognition through contact (vibration of vocal cords) Adjustable sensor sensitivity Adjustable electrostatic impulses Vibration function can be switched off so only sounds are emitted Splash-protected collar with 3V CR123A lithium battery Battery performance 6 months for normal use Collar weight 92 g Only at zooplus 3-year guarantee Made in France The set contains 1 collar for neck sizes 20 cm to 67 cm with short contacts 1 3 volt CR123A lithium battery 1 test lamp 1 set with two long contacts 1 screw driver for adjustments Instruction leaflet