WayinTop 3 Set 433MHz RF Wireless Transmitter and Receiver Module + Helicoidal Antenna Spiral Anti-theft Alarm

【How to Use】VDC voltage should be consistent with the module's operating voltage and should remain in good power filtering. 【Perfect Kit】This kit includes 3 pairs of transmitter and receiver modules and 3 pairs of spring antennas to increase communication distance. And the frequency is 433MHz. It is very popular for remote control systems, such as remote control rolling doors, smart car, smart home, etc. 【Easy to Use】Great influence on the reception of the antenna module, preferably connected to the wavelength of 1/4 of the antenna, typically a single conductor of 50 ohms. The length of the 433M antenna is about 17cm. 【Wireless Transmitter Modules】Allow your to communicate wirelessly with others, or with radio frequency (RF) controlled devices operating on the same frequency (433MHz in this case). 【Warm Tips】 The antenna position has also affected the reception of the module, installation, the antenna as directly as possible from the shield, the high pressure and the source of interference. The frequency used to receive, decode and oscillation resistor must match the transmitter.