1、35mm DIN standard rail mounted, conforming to Standards DIN EN 50022 2、Bipolar width, complying with standard DIN43880. 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、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. Features: 35mm DIN standard rail mounted, conforming to Standards DIN EN 50022 Bipolar width, complying with standard DIN43880. 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 LEDs 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: XTM35S Accuracy: Class 1 Current: 20(80)A Size: 10*3.6*6.5cm/3.9*1.4*2.6in Weight: Approx.160g/5.6oz Package included: 1 x  DIN-Rail Electric Meter 1 x Manual