The difference between the two units is the resolution. The Quantum II has a resolution to 1.0 Ohms and the Quantum X has a resolution to 0.1 Ohms., or ten times that of the Quantum II.
Both the Quantum II and the Quantum X are hand held analyzers that weigh 11 oz., and run on a 9-volt battery (ONLY).
Neither system stores data nor do they have serial communication capability.
All RJL BIA instruments test with equally accurate resistance and reactance results, and all RJL BIA results can be entered into our current software for body composition analysis.