Lutron (86900) RRDH6BRLWH RadioRa 2 Hybrid Wall Keypad 6 Buttons RadioRA 2 Hybrid Keypads function as a dimmer and keypad combined into a single device. Hybrid Keypads are great for retrofit applications since they eliminate the need to install two separate devices.RadioRA 2 Hybrid Keypads have an available neutral wire terminal that allows them to be installed in either twowire or neutral wire installations. Connecting the neutral wire to a Hybrid Keypad allows a lower minimum load to be used. Also, normal keypad operation will be available even if the attached load is not installed or if the lamp is burned out. If a neutral wire is available in the wallbox it should be connected to the silver teminal on the Hybrid Keypad. If a neutral wire is not available and not desired, then the silver terminal should be tightened without any wires connected to it. Hybrid Keypads can be installed in either single location or multilocation (with Remote Dimmer) installations.