Power Meter LED Display Mounting Surface Input Voltage 20 to 721V AC Delta 42 to 416V AC Wye Amps 1 A +/-0.20 Percent Accuracy Measures Amps Energy Volts Enclosure Rating NEMA 12 Hz 50 Meter Range 20 to 721V AC Delta 42 to 416V AC Wye Phase 3 Operating Temp Range -4 Degrees to 158 Degrees F Height 4.85 in Width 4.85 in Depth 4.25 in