110V 220V 4 Channels Wireless Relay Remote Control Switch,RF 433Mhz AC 90V-250V Garage Door Opener Wireless Switch Receiver 2 Transmitters, Easy to Terminal Wiring (4CH 2* Controller 433Mhz)

This review is for both this 110V-220V 4-Channel Wireless Relay Switch and the almost identical 12V-24V 4-Channel Wireless Relay Switch manufactured by the same company. I tested both, and both work identically.I’ve been into home automation for decades using powerline control. But there are instances where wireless control is more appropriate, or where several different devices must be controlled at the same location. These wireless controllers are perfect for those applications. The only difference between the two modules is that one is powered by 90-250VAC, and the other by 5-30VDC. Both incorporate several different operating modes. They arrived with the momentary mode pre-programmed. They also offer toggle on/off, sequence where one relay is on at a time, and combinations where 2 relays operate in the momentary mode while the other two operate in a toggle mode.For my application I wanted the toggle on/off mode. There are 5 LED indicators, 1 for each relay status, and one that lights when receiving a command or to indicate programming status. At first nothing I tried following the “How to compatible/add remote control and different working models” would get it into the toggle mode. I tried pressing the programming button first, the remote button first, and then sequencing one or the other buttons. The programming status LED would brighten or flash, but it always reverted to the momentary mode. Hmm…. Another line in the instructions says to press the programming button 8 times “to remove/delete the remote control”. So I tried that, and then the programming again. That time it worked. The instructions should make it clear that the present program must be deleted before programming a new one. I confirmed they work in all operating modes exactly as expected.Both of these units use the Songle 10A 250V relays that I use myself in my own products. They are rugged and very reliable. So operationally, both of these units should have no trouble handling any loads from 1V to 250V and up to 10 amps. Note that the UL spec on those relays is a more conservative at 10A/125VAC 28VDC. While the instructions could use a little help from someone fluent in English, they include details on how to configure various loads. In summary, these are both excellent 4-channel wireless relays that work exactly as described.