4 Channel RF Wireless ON/OFF Smart Switch with RF Remote Control 5 metres which are Orange

which are Orange

the design is of metallic mesh case which enhances the heat dissipation of  LRS-150 that the whole series operates from -30°C through 70°C under air convection without a fan

It has a 2-wire interface

These modules are so small

4 Channel RF Wireless ON/OFF Smart Switch with RF Remote Control 5 metres which are OrangeA Four channel relay board with a wireless RF interface that can be controlled by a wireless remote. The relays can regulate 250 V 10A appliances, motors, and other electrical circuits, etc. When the remote is in line of sight, the board has a range of 100 meters and roughly 25 meters indoors. This board's RF connection operates at a frequency of 433MHz. Both the transmitter and the receiver have an inbuilt antenna and are easy to use. Receiver