Sonoff WiFi Wireless Smart Switch, Control home appliances with APP,remote control Appliance Controller for DIY Smart Home,Compatible with Alexa ( SONOFF RFR2) - - Amazon.com
Works with Alexa Instruction Guide - SONOFF Official
2pcs/Pack) Sonoff RF r2-433Mhz RF Remote Control WiFi Wireless Smart Switch for Smart Home for Home Appliances and Lamps, Work with Amazon,Alexa,Google - - Amazon.com
SONOFF RFR2: ETL Certified Wireless Remote Control Smart RF Switch|ITEAD
Sonoff RF R3 WiFi Wireless Smart Switch with RF Receiver for Smart Home, Works with Alexa & Google Home Assistant, Compatible with IFTTT, No Hub Required, Support DIY Module. - - Amazon.com
New Hardware (Episode 2): IP Camera, Itead Sonoff Goodies, and Amazon Echo Dot
Sonoff RFR2 WiFi Wireless Smart Switch with RF Receiver for DIY Smart Home, Works with Alexa & Google Home Assistant, No Hub Required - - Amazon.com