This is the same REED R5408 resistance decade box -- 7 switch-selectable decade ranges from 1 ohm to roughly 11.1 megohms in 1-ohm steps, with slide switches and three binding posts for isolated substitutions -- but supplied with a NIST-traceable calibration certificate documenting measurement accuracy and uncertainty. It suits labs and workshops where documented traceability is required alongside the standard 1% substitution accuracy.