When at some predetermined voltage, it actually shuts off . If a voltage between 121-329Vac is sustained, most suppressors have little to no effect at all. Not so with the MAX 8 as it contains a functional relay that physically disconnects the voltage until safe conditions are present once again. Frankly, this is one unbelievably cool feature. The MAX 8 has 6 pairs of RJ-45 connectors for various uses.
All connections are surge protected at different voltage levels.
Notice that all plugs are separated to ease the normally frustrating task of squeezing in large wall warts, such as those included with speakers, scanners and the like. At the very bottom, four LEDs indicate line faults, grounding problems, unsafe voltage conditions and general power status. Very informative and thorough I must say. BUT, I could open the unit and peer inside. The MOV's, a standard set of six Z131-20UL suppressors, provide the UL 330V spec although technically, clamping begins at 130Vac rms.