Vastar VD285 Dog No Bark Collar Electric Anti Bark Shock Control with 7 Levels Button Adjustable Sensitivity Control, Stimulation of No Harm Warning Beep & Shock for 15-120 lb Dogs Want a new version no bark collar that detect bark more easily High-quality electronic dog bar collar and sends harmless warning sound and shock when dog barks 7 sensitivity levels adjustable for the different size of dogs barking Unique bark terminator, replaceable 6-volt battery and low battery If the dog is too small, you must use it under the guidance of the master to avoid unnecessary harm