Single Wire, No Vegetation: 15 acres / 3 miles Multiwire, Typical Vegetation: 5 acres / .5 miles 0.1 Stored Joules Turn on and forget - Energizer will continue to work for up to 3 weeks without sun Quick to install - can be setup easily in any location and moved about as required Super tough, drop resistant, waterproof casing with built-in lightning protection - designed to be left outside, in all weather conditions 360 degree mounting on steel posts for correct placement toward the sun - allows the Energizer to be mounted on a steel post that is already part of the fence line, regardless of which way the post is facing