35mm standard DIN rail installation , complying with standard DIN EN50022.Seven digits display LCD, 6+1 digits display (999999.1 kWh)There are a polarity port of pulse output passive closed and a nonpolarity port of pulse output passive distant (the output rate is 10 kWh/pulse).Automatic detection the direction of the flow of load current. And Instructions on individual LCDStandard configuration short terminals cover, may select extension terminals cover, in order to protect to use safety.Model: XTM1250SA-UAccuracy: Class 1Voltage: 3x230V / 400VCurrent: 20-80AInsulation performance: AC voltage 4kv for 1 minute,1.2/50us waveform impulse voltage 6kvColour: whiteMaterial: plasticPackage Contents:2 x energy meterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.