Strong 433MHz RF Signal The RF wireless relay remote control switch, which uses 433MHz radio frequency technology, has a strong signal that can penetrate walls, floors, doors, and the EV1527 learning code chip makes the remote control system safer. You can control each device connected to the relay receiver via the transmitter from anywhere within a reliable distance. Easy to Use Extremely easy to set up and reset. There are 3 working modes (Momentary/Toggle/Latched mode). You can easily configure it yourself according to your needs. The working mode is adjustable. The receiver with 2 relays that can be controlled independently. And there are 3 terminals (normally open, common, normally closed) of each relay. Widely Used The products can be used in homes, farms, factories, offices, laboratories, supermarkets, etc. Wireless remote control applications range from simple household remote controls to automation such as electric curtains, garage doors, motors, alarm systems, lighting, etc.