This is 4 Channel RF Remote Control Metal Switch with 433MHz Transmitter. With this remote control, you can control all 433MHz fixed code key fobs. Easy to use, the 4 channel remote control system. Radio frequency (RF) is a unit of measurement that represents the oscillation rate of the electromagnetic radiation spectrum, or electromagnetic radio waves, with frequencies ranging from 300 gigahertz (GHz) to 9 kilohertz (kHz).
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|Country of Origin||China|