Eaton 15-Amp 4-Way Toggle Light Switch, White in the Light Switches department at Lowes.com
4-Way Smart WiFi Switch Wall Light Control Touch Screen Switch WiFi Remote Control Switch Voice Control Switch Single Circle for Alexa Google Home SIRI(US Black): Amazon.com: Tools & Home Improvement
Dimmable Switch - Best way to add dimmers to this 4-gang outlet? 2nd from left needs dimmer, at a minimum. : r/homeautomation
NEW EAGLE 1242 BROWN 4 WAY QUIET TOGGLE LIGHT SWITCH 15A 120-277V USA | eBay
electrical - How can I eliminate some of the switches in a 4-way circuit? - Home Improvement Stack Exchange
Is it possible to use Kasa with 4 switches to 1 light? - Smart Home Community