Features:
1) Plugs into any 110-volt / 230-volt AC outlet
2) Advanced electro-magnetic and ultra-sonic technology
3) Protects a 5,000-square-foot (460-square-meter) area
4) Features an audible test button, night light, and three LED status indicators
5) Low energy cost (4W)
6) Safe around children, pets, electronics and computers
7) Patent No.03345746.8