Installing Aeon Labs micro dimmer on 4-way circuit - Connected Things - SmartThings Community
Dimmer Switches - Electrical 101
Lutron NT-4PS-SI Nova T 120V / 277V / 20A 4-Way Switch in Sienna, Matte Finish
ELEGRP Digital Dimmer Light Switch for 300W Dimmable LED/CFL Lights and 600W Incandescent/Halogen, Single Pole/3-Way LED Slide Dimmer Light Switch, Wall Plate Included, UL Listed, 1 Pack, Matte Black - Amazon.com