Electric fence 1.Transmitter with Boundary Control Switch has three settings which can adjust according to the length of Boundary Wire used. . 2.Transmitter with Ground Terminal can help reduce the chance of electrical surges causing damage to your Fence transmitter and/or Power Adaptor. 3.Transmitter with Fuse to protect the unit's electronic circuitry from electrical power surges. . 4.Tone plus static correction only mode for training. . 5.Covers up to 10 acres with additional wire and flags. . 6.System works with multiple pets. 7.Package Contents: • 1 x Indoor wall-mounted transmitter; • 1 x Power plug; • 1 x Adjustable receiver collar; • 1 x 6 Volt battery for collar; • 1 x boundary wire of 1000ft; • 2 x Extra metal contact points; • 50 x Training flags; • 1 x Test Light; • 2 x Wire Nuts; • 1 x Operating and Training Guide.