This product is a very powerful 12V rechargeable battery unit, will also run on very large 12V rechargeable batteries. 12V full discharge protection. Indicator light to control fence and battery condition. Portable and easy to use. Suitable for all-round farm use, strip grazing and paddocks. Will energise up to 15km of well insulated single line fencing (depending on load conditions). Three years guarantee. Maximum voltage: 9200 volts. Voltage @ 500 ohms: 4000V. Input (load) energy: 1.4 joule. Output energy: 1.0 joule.