Fi-Shock EAC10A-FS AC-Powered Electric Fence Energizer, 10-AcreFi Shock AC Powered, 10 Acre Charger, a high power electric fence charger, features a continuous AC current output and weather resistant cabinet to protect the circuitry of the charger (however, the unit is not completely weather proof, there are exposed connectors that should not become wet due to the risk of potentially shorting out the unit). The range for this low cost charger is 10 acres. For Use 20 9 Gauge steel aluminum wire only. Do not use