AMA B2000 Ranch energizer for 12Volt power supply enclosures with the possibility of using 9V batteries or operation with 230 V mains adapter, maximum length of the fence 10Km, charge energy 2.3 Joules. VOLT: 12/9V, or 230V CHARGING CURRENT: 2.3/1 J MAXIMUM ELECTRIC DISCHARGE: 1.5/0.5J MAXIMUM VOLTAGE: 12.500/8.800V VOLTAGE AT 500 OHMS: 4.600/3.500V Maximum length with strong vegetation: 1.2/0.6km with little vegetation: 4/2.5km without vegetation: 10/5km AMA Code: Original code: 58510 AT