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RFM69HCW 433 MHz Transceiver Radio Module : ID 5693 : $5.95 : Adafruit Industries, Unique & fun DIY electronics and kits
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Amazon.com: kwmobile 433 MHz Transmitter and Receiver Module Kit for Remote Control Raspberry Pi Arduino Pack of 3 : Electronics
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Ethernet Modbus 433mhz Rf Transmitter Long-range Communicator Radio E90-dtu(433c30e) Iot Plc 433 Mhz Rj45 Rf Transceiver - Fixed Wireless Terminals - AliExpress
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