eMylo DC 12V 2x 2 Channels 433Mhz Wireless RF Relay Remote Control Switch 2pcs Transmitter with Receiver for Garage Door Motor The product adopts RF technology, with long remote control distance and stable signal. The integrated module features stable performance, making the product easy to use,strongly reliable and enduring. It adopts non-directional wireless encoding technology, allowing independent control without mutual interference. The programmable transmitter and receivers can be flexibly configured in quantity and in operating modes. It is widely used in industrial control and security fields, such as light, motor, remote controller, wireless security alarm, wireless door alarm, wireless controller, etc.