AMA BT30 Ranch Energizer for Enclosures with 9Volt Power Supply, Maximum Fence Length 2Km, Charge Energy 0.3 Joule Volts: 9 Charging Current: 0.3J Maximum Discharge Current: 0.24J Maximum voltage: 9900V Voltage at 500OHMS: 2900V Current consumption: 30mA Maximum length with strong vegetation: 0.3km Maximum length with little vegetation: 1km Maximum length without vegetation: 3km AMA Code: Original code: 91909 AT