The 5500 12-Outlets Surge Suppressor is designed for mounting on 19-inch racks where transient voltage surge suppression is desired for rack-mounted electronic equipment. It offers total of 12 protected outlets, 10 in back and 2 in front, to provide easy plug-in convenience for all mounted equipment. It's advanced circuit design offers extremely tight clamping levels extremely tight damping levels and exceptional noise attenuation.