MODEL - XTM75S-U DIN-Rail Electric Meter. It has 6 pole width (Modulus 12.5mm), complying with Standards /T7121-1993. May select 5+1LCD digits display (99999.1kWh) .ADVANTAGES - Single direction measure single phase two wire active energy consumption. It is nothing with direction of the flow of load current.STANDARD DIN EN50022 - 35mm standard DIN rail installation, complying with standard DIN EN50022. 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.HIGH QUALITY - Standard configuration one port of pulse output passive (polarity), May select increase a distant port of pulse output passive (nonpolarity), complying with standard IEC 62053-31Specifications:Model: XTM75S-UAccuracy: Class 1Voltage: 220VInsulation performance: AC voltage 4kv for 1 minute,1.2/50us waveform impulse voltage 6kvSize: 10 x 7.6cm / 3.94 x 2.99inStyle:5-30AColour:WhiteMaterial:ABSPackage Contents:5 x DIN Rail Electric 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.