Current Range: 10-100A, 20-100A Voltage Range: 210-250V, 105-127V Frequency: 50 or 60Hz System Connection 1 phase, 2 wire Insulation: 4kV RMS 50Hz Impulse Withstand: 12kV 1.2/50ms 40ohm source Certified Product Life 20 years (OFGEM model) Temperature -20C to +55C (Op range), -25C to +85C (Storage) Pulse Output 100ms pulse 100p/kWh (=10Wh/pulse) Specifications kWh Class 1 or 2 EN 62053-21:2003 kvarh Class 2 or Class 3 En 62053-23 Case IP53 to IEC 60529:1989 PLEASE NOTE THAT PULSE OPTION IS AN OPTIONAL EXTRA AND IS £4 EXTRA Just add it in the drop down menu on this screen