Features 1、Automatically loop display multiple parameters: Active Energy, Voltage, Current, Power,  Power Factor, Frequency. 2、This energy meter adopts RS485 communication, with good anti-noise interference ability. 3、Flame retardant ABS outer case, anti-impact, corrosion resistant, good insulation performance.  4、High reliability, compact and lightweight, 35mm DIN rail mount. 5、Strong anti-electromagnetic interference, low power consumption, high precision, electricity anti-stealing. Specification Item Type: 3 Phase 4 Wire Energy Meter Model: DDS578MR Reference Voltage: 3 x 230/400 V Reference Current: 3 x 5 (100) A Frequency: 50Hz / 60Hz Constant Pulse: 400imp / kWh Maximum Working Current: 100A Energy Measuring Range: 0.0-999999.99kwh Output Voltage: 380VAC Display: LCD 6 + 1 Power Consumption: ≤2W, 10VA Material: Metal + ABS Package List 1 x Energy Meter 1 x Manual