This LEMO sensor connects directly to the bedside monitor without an extension cable. It works with the following patient monitors: CSI (Criticare Systems International) Scholar, Poet (602-3A), 1100, 2200, 500, 500A 501, 502 series, 503, 504, 504/P, 504O/P, 504US/P, 507, 507E/P/R, 507/S, 507SD, 5070/P, 508, 509, 581. 9-foot cable.