Sonoff DC5V 12V 24V 32V Wifi Switch Wireless Relay Module Smart Home Automation Modules Phone APP Alexa Google Home Voice Control for Access Control System Inching/Self-Locking - Walmart.com
Sonoff 4CH PRO (R3) WiFi + RF smart relay switch with 4 channels, NO/NC and dry contact support - eWelink Store
Sonoff MiniR4 is extreme(ly) small - NotEnoughTech