||Built into the PS 4x4 is a surge and spike protection system, designed to protect powered equipment from harmful electric surges and spikes. The unit also has RFI and EMI filtering, a 15 amp breaker, and a total power capacity of 1800 watts. The PS 4x4 also features a front-located on/off power switch (which lights up when turned on), and a front-mounted circuit breaker reset switch. The rugged, all-steel chassis occupies 1U rack spaces and is intended for installation into standard 19 in. equipment racks.