150MHz VHF UHF 433MHz RF Transceiver RS232 RS485 Wireless Radio Modem 5km Data Communication Receiver and Transmitter - China Radio Modem, VHF Radio Modem | Made-in-China.com
Vhf/uhf Radio Módem Rs485 Rs232 Usb Transceptor Inalámbrico 20dbm 433m 868m Transmisor Y Receptor - Inversores Y Convertidores - AliExpress
RM8 Software-defined - VHF - UHF - Data Modem Modem