The HDP 900 gives your delicate HDTV and digital AV electronics the advanced protection they need. For a triple layer of safety, the HDP 900 protects against power surges and spikes on all three power lines (line, neutral, ground). With over 3780 Joules of surge absorption capacity, the HDP 900 provides a very high level of protection. The HDP 900 also features advanced ceramic-encased MOVs for additional safety. Ceramic insulation offers superior fire protection to keep your home theater equipment, and the rest of your home, protected against fires caused by high-power surges.