Destinie Anti Bark No Barking Tone Shock Control Training Collar for Small Medium Dog New Package Included: 1 x Collar, 1 x Test light, 1 x 6v batteries. Collar length adjustable from 12" to 20", Weight 3 oz (module + battery) Integration of static stimulation and tone command. Different levels of static stimulation to teach your pet to behave. Microprocessor controlled. Led flash signal light. Low battery consumption.