This product is very powerful 12V rechargeable battery unit, allows for alternative operation with 9V dry battery, also 230V mains operation by power adaptor (not included). Allows for solar assistance. 12V full discharge protection. Steplessly variable output energy. Two separate LEDs to control fence and battery condition. Suitable for all-round farm use, strip grazing and paddocks, ideal for sheep containment. Will energise up to 10km of well insulated single line fencing (depending on load conditions). Three years guarantee. Maximum voltage: 9300 volts. Maximum voltage @ 500 ohms: 4600V. Maximum input (load) energy: 2.3 joule. Maximum output energy: 1.5 joule.