Check the listing for details. Hyperion Local Data Unit (LDU). Condition: New. Listed at 5.48 USD. Tap here to read more about Hyperion Local Data Unit (LDU)Hyperion quality products!HP-EM2-LDU is an inexpensive alternative to the RDU unit, for bench testing.It must be connected to the Emeter Ⅱ during test runs. It has the full functionality of the RDU, except for the Height (altitude) indicator.LDU UNIT - LOCAL DATA UNIT Specifications• Dimensions: 31 x 26 x 13.4mm• Weight: 24g (according to wire length)• Can be used without Emeter• PC software required to read data (software is free)• Logs at bench while connected to Emeter or PC via USB Adapter (TI-PRGUSB)• Records to Emeter/PC: Current Voltage Watts• Optional External Sensors: Temp1,2 and 3 along with Reliable Phase Tachometer for Brushless Motors• Sample rates from 4 samples per second to 8 seconds per sample• Firmware upgradable by Emeter with SD card installed or by PC application• (logging with LDU direct to PC requires Emeter Ⅱ Suite installation)