Normally, when using a dimmer in a 3-way or 4-way circuit, only one dimmer can be used in the circuit to control the load. Select Leviton product lines, including Decora Smart, Decora Digital, Renu, and Renoir II, support the use of Companion Dimmer Remote devices, which can be used to dim from multiple locations in a 3-way or 4-way circuit. Please refer to your device’s instruction sheet for 3-way compatibility information.