1、35mm standard DIN rail installation, complying with standard DIN EN50022. 2、6 pole width, complying with Standards JB/T7121-1993. 3、Can select the step motor impulse register of 5+1 digits (99999.1kWh) . 4、Equipped with a polarity passive energy impulse output terminal, conforming to Standards IEC 62053-31 and DIN 43864. 5、Two LED to indicate separately the power state and the energy impulse signal Features: 35mm standard DIN rail installation, complying with standard DIN EN50022. 6 pole width, complying with Standards JB/T7121-1993. Can select the step motor impulse register of 5+1 digits (99999.1kWh) . Equipped with a polarity passive energy impulse output terminal, conforming to Standards IEC 62053-31 and DIN 43864. Two LED to indicate separately the power state and the energy impulse signal Measure the active energy consumption in one direction on single phase two wire, which is not related with the load current flow direction at all, complying with Standards IEC 62053-21. The short terminal cover is made with the transparent PC, to reduce the installation space and is convenient for centralized installation. Specifications: Model: XTM75S Accuracy: Class 1 Working Voltage: 220V Current: 10(40)A Insulation performance: AC voltage 4kv for 1 minute,1.2/50us waveform impulse voltage 6kv Size: 8.8 x 7.5cm / 3.46 x 2.95in Weight: 288g Package included: 1 x  DIN-Rail Electric Meter 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.