Brilliant Control 4-way Wiring Guide – Brilliant Support
4-way switch problem - Wiring Discussion - Inovelli Community
Nano Dimmer wiring 3-way/4-way/5-way switch methods. : Aeotec Help Desk
Best 4 Way Smart Light Switches — OneHourSmartHome.com
electrical - Does it matter which 3-way switch I put a dimmer at on a 4-way circuit? - Home Improvement Stack Exchange
Change 3 way switch to 4 way with smart dimmers - Devices & Integrations - SmartThings Community
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
4 way dimmer switch options : r/TPLinkKasa
Installing a Multi-way Brilliant Smart Dimmer Switch Setup – Brilliant Support