This direct-connect spO2 sensor is available for use with Nihon Kohden: 2303 Life Scope I, 2353 Life Scope L, 4103, 4111, 4113 4114A, 5135, BSM-2301, BSM-230K, BSM-2351, BSM-4101, BSM-4102, BSM-4102A, BSM-5105, BSM-6000, BSM-9101, Life Scope A, Life Scope J, Life Scope P, PVM-2701.