wiring - Installing a smart dimmer switch into 3 gang box - Home Improvement Stack Exchange
TOPGREENER In Wall Dimmer Switch Single-Pole/3-Way LED Decorator Light Dimmer with Wall Plate, White (3-Pack) in the Light Dimmers department at Lowes.com
Meross Smart Dimmer Switch, 3 Way(US/CA Version) – Meross Official Store
How to Install a Dimmer Light Switch: Wiring and Replacement (DIY)
Triple Dimmer Switch White with Knobs in Four Colours