Features 4P Electric Meter: 35mm standard DIN rail installation, complying with standard DIN EN50022. Six pole width (Modulus 12.5mm), complying with standard JB/T7121-1993. May select 5+1LCD digits display (99999.1kWh) . Standard Configuration: Standard configuration one port of pulse output passive (polarity), May select increase a distant port of pulse output passive (nonpolarity), complying with standard IEC 62053-31 Individual LED: Standard configuration don't detection direction of the flow of load current. May select automatic detection the direction of the flow of load current. And instructions by an individual LED. Single-Phase 2 Wire: Single direction measure single phase two wire active energy consumption. It is nothing with direction of the flow of load current. Complying with standard IEC 62053-21. Safe to Use: Standard configuration short terminals cover, may select extension terminals cover, in order to protect to use safely. Specifications: Model: XTM75S-U Accuracy: Class 1 Voltage: 220V Current: 5(30)A,15(60)A, 20(80)A (Optional) Insulation performance: AC voltage 4kv for 1 minute,1.2/50us waveform impulse voltage 6kv Size: 10 x 7.6cm / 3.94 x 2.99in Weight: Approx. 270-277g Package included: 1 x  DIN-Rail Electric Meter 1 x Manual Note: Please note that the new type and old type of this product will be sent randomly, and make sure you will not mind before ordering. Package List