Hard wiring required on this model. Our Regulators will continuously protect your electronics & electrical equipments, including UPS, from destructive street power line interference and thrash with heavy duty, industrial grade Spike Suppression and wide band interference filtering Industrial environments usually suffer a double whammy. Destructive street power plus spikes, surges and interference caused by in-house heavy duty motors and equipment will also adversely affect hi-tech equipment Avoid operational disruption, damage and down time. Use our Voltage regulators and stabilizer to protect all your electrical products.