The ultrasonic bark control, Canicalm Sonic, was specially developed for very sensitive dogs. This bark collar for small and sensitive dogs will allow you to gently control excessive barking of your pet. Product features include three operating modes (ultrasound, vibrations, ultrasounds + vibrations), triggers with the vibrations of the dog’s vocal cords, low battery indicator (beep sound), adjustable bark detection sensitivity, on/off and mode selection with a magnetic key. This bark collar has an ergonomic design, is ultra light (only 52g), has no static stimulation, is shower proof and is easy to use. Its black nylon strap is 64cm long and 20mm wide, and adjustable for neck sizes between 17cm and 55cm.