The Patriot PS5 Energizer is ideal for keeping small nuisance pests out, or for keping small animals safely contained. The light, compact design with carry handle makes this charger ideal for portability. The unit includes internal battery and solar panel, providing a convenient all-in-one energizer. Energy efficient solar panel charges the internal battery to power the fence line. Flashing red light indicates fencer is working. Solar power recharges the battery as required to support long battery life. Its low impedance design delivers power to the end of the fence even under heavy load (e.g. foliage, undergrowth). It requires no trenches or underground cable, so it can be set up quickly. 1 year warranty (includes lightning).