Key Fob Remote Controlled Switch 4-Channel General Purpose Long Range Wireless - NCD Store
110V 4CH Wireless Control Relay Switch 433MHz 4 Channel Remote Relay 2 Transmitters and Receiver Universal Garage Doors,Window, Motor AC 85V 110V 220V 250V Remote Relay Switch (2X Control 433M) - Amazon.com
iO HVAC Controls iO-WRP 4 Channel Wireless Relay PLUS Kit
AC 220V Wifi Relay Module 4 Channel Wireless Remote Control Switch Board 10A Relays For Smart Home eWeLink APP Control - AliExpress
DC 12V 4 Channel Relay 10A RF Wireless Remote Control Switch System Receiver Transmitter Wireless Light Switch for Smart Home/Relay output NO COM NC/Normally open Normally closed Common terminal - Amazon.com
4-Channel wireless RF Relay module - Geeetech Wiki
DC 12V 4-Channel Wireless Remote Control Switch, MELIFE 433Mhz RF Switch 2 Transmitter & 1 Receiver for Garage Door Openers, Cars, LED Lights & More - Amazon.com
QIACHIP 433Mhz Wireless Remote Control Switch DC 12V 4 CH Relay Receiv