1,  Features 1.100% brand new                                      2.High qualtiy 3.Increasing sound and gradually shock.   4.Sensitivity adjustment by different dog. 5.Small and lightweight.                             6.Microprocessor controlled. 7.Water resistant,rain and snow will not affect operation. 8.Operates on a standard 6 volt battery(Available below). 9.Voice Recognition feature minimizes false triggering. 10.Effective on dogs from 2 kg to 60 kg. 11.Operates on a single, long life, 6 volt alkaline battery (Available below). 12.High quality and widther nylon strap adjusts from 5" to 24"