If your pet dog barks constantly and was keep disturbing the neighbors. This dog training collar works very well on their behavioral training， and your dog would stop the constant barking after wearing it. Surely you and your neighbors will be thankful about that. Definitely a worth buying product! Features:Adjustable nylon collar.7 levels adjustable sensitivity control.Humane， effective anti-bark dog collar training system.Stimulation of harmless warning beep and static electricity.No more worrying that your dogs will disturb or annoy anyone.Very humane， easy and safe way to train your dog to stop barking.Specifications:Material: ABSReceiver Powered by: 1 * 4A76 6V alkaline battery (Not included)Collar Strap Length: Approx. 74cm / 29.13inItem Weight: Approx. 76g / 2.67ozPackage Weight: Approx. 108g / 3.81ozPackage Size: Approx. 8 * 4.6 * 7.5cm / 3.15 * 1.81 * 2.95inPackage List:1 * Receiver1 * Test Bulb1 * Collar2 * Long Shock Electrodes2 * Short Shock Electrodes1 * Manual (English)