The Kidde Quick Connect Wiring Adapter for Hardwired Smoke and Combination Detectors connects a new Kidde smoke or combination detector with other Kidde hardwired alarms easily - without having to strip wires or use wiring nuts. Kidde wiring adapters create a quick and easy installation experience for hardwired detectors. The Kidde wiring adapter is for use with Kidde-branded products only. This adapter can be used to quickly allow replacement of the Listed Kidde legacy models with new Kidde models that use the new style connector without having to rewire or replace the existing legacy Kidde models wire harness: i12020, i12020A, i12040, i12040A, i12060, i12060A, i12080, i12080A, i4618, i4618A, i4618AC, KN-SMFM-I, RF-SM-ACDC, PE120, P12040, Pi2000, Pi2010, KN-COSM-I, KNCOSM-IB, KN-COSM-IBA, KN-COPE-I, KN-COPE-IC, KN-COB-IC, KN-COP-IC, SL177i, SLED177i, HD135F, SM120X, CO120X, i12010S, i12010SCO, P4010ACSCO, P4010ACSCO-W, P4010LACS-W, P4010ACS, P4010ACS-W, P4010ACLEDS-2, P4010ACLEDSCO-2, 3050-VAS10-A, 3050-VASC10-A, P4010ACSCO-WF, P4010ACSCOAQ-WF.