Feature 1SUPER ULTRASONIC: Dog barking deterrent device produces ultra strong ultrasonic waves that can make dogs run away quickly. 2INFRARED LIGHT: Dog barking deterrent can effectively stimulate the dog's nervous system. Infrared light can make the dog follow. 3DOG TRAINING DEVICE: Anti barking device emits a harmless but effective sound to control excessive barking and help you correct their behavior. 4EASY TO CARRY: Dog training device is convenient and easy to use. It fits perfectly in the hand and is perfect for anyone to use outside. 5ABS MATERIAL: Dog barking control device is made of ABS material for long term use and is a great choice for an outdoor dog bark stopper.SpecificationItem Type: Dog Barking Control DeviceMaterial: ABSProduct Specification: Double Headed Black (Plus Battery)Size: Approx. 13.7x5.5x2.5cm / 5.4x2.2x1.0inPower Supply: 9v Rectangular Battery (With Battery)Product Use: Portable Dog Trainer .wang-edit-text{ font-family:'Arial' !important; } .wang-edit-text table { border-top: 1px solid #000; border-left: 1px solid #000; } .wang-edit-text table td, .wang-edit-text table th { border-bottom: 1px solid #000; border-right: 1px solid #000; padding: 3px 5px; } .wang-edit-text table th { text-align: center; }Package List1 x DogBarkingControlDevice1 x 9v Battery1 x Instruction ManualNotePlease allow some error due to manual measurement.