Remote Data Unit (RDU) for Emeter II Included in Emeter V2 sets HP-EM2-SET and HP-EM2-DLX, Can be used without Emeter - PC software required to read data (software is free)
Hyperion Micro Data Unit (MDU) for Emeter II Max input voltage: 35 V, Continuous current: 25 A, Peak current: 50 A / 5 seconds, Can be used without Emeter - Interface cable and PC software required to read data (software is free)