Lutron Caseta Wireless Smart Lighting Dimmer Switch and Remote Kit for Wall & Ceiling Lights, P-PKG1W-WH, White Price: $59.80 (as of 25/05/2022 14:15 PST- Details)

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Hub is required for it to be compatible with Alexa
Works with Alexa to support dimming through voice control (Smart Bridge required, Alexa device and Smart Bridge sold separately)