Lutron MAW600H-WH Electronics Maestro Duo Dimmer, White single pole switch
These units make full-range dimming possible from up to ten locations in your home. LEDs show preset light level when product is off and lights fade up and down smoothly allowing your eyes to adjust to changing light levels.Ten second fade-to-off (press and hold switch) lets you leave the room before lights go out and they use standard 3-way wiring for easy installation and retrofit.