This short 3-foot cable sensor is for use with an extension cable, and is compatible for the following SpO2 monitors: Respironics: All monitors that have a 6-pin connector including models 920, 920M and 920M Plus. Also for use with Respironics/Novametrix Healthdyne hand-held Tidal Wave 710Sp and 715Sp Monitor. Please note that some Respironics 920 models require a 7-pin connector, for these models please order item S403-08T0.