MOES Mini DIY WiFi Smart Light Switch Module|1 Gang WM 104 MS Relay
Lutron Caseta Smart Lighting 5-amp Single-pole/3-way Smart Tap Master Light Switch with Wall Plate, White in the Light Switches department at Lowes.com
Wireless Light ON/OFF Switch Lamp Remote Control Transmitter Receiver DIY White | eBay
DIY Wi-Fi Smart Switch for Home Automation
DIY Wi-Fi Smart Switch for Home Automation
Tuya Wifi Smart Light Switch Module Supports 2 Way Control, App Remote Control DIY Breaker 100-240V, Work with Alexa Google Home - AliExpress
Self-Powered Switch Technology -
Wireless Light Switch Circuit
RunLessWire 3-Way Wireless Light Switch & Receiver Kit with Infinite Battery No WiFi or Batteries Needed 150+ft RF Range DIY Pre-Programmed Remote Control - 1 Receiver, 2 Switches - White - Amazon.com
RunLessWire Fan & Light Wireless Switch & Receiver Kit with Infinite Battery No WiFi or Batteries Needed 150+ft RF Range DIY Pre-Programmed Remote Control - 2 Receivers, 1 Double Switch - White - Amazon.com
RunLessWire - The Original Self-Powered (NO Batteries) Wireless Light Switch & Receiver Kit No WiFi Needed DIY, Remote 150+ft RF Range - 4 Way: 1 Receiver, 3 Switches - White - Amazon.com
SONOFF Outlets BasicR2 Wifi Breaker Switch Smat Wireless Remote Controller DIY Wifi Light Switch Smart Home Works with Alexa - AliExpress