RS-485 wireless transmitter up to 300m - Cablematic
Amazon.com: Wireless Transceiver Module, 433MHz UHF DTU RS485 Bus RF Serial Port UART Transceiver Module for PTZ Camera, LED Controller, Wireless Instrument : Electronics
RS-232/RS-485 Network Video Transceiver , Wireless HD Transmitter Two Way Transmission
Serial RS485 / RS422 WiFi adapter
Rs485 Wireless Transceiver Analog Cellular Transceiver Cellular Modem
Amazon.com: Master Slave Network Transceiver RS485 Interface Wireless Serial Port Communication UHF FR Module with Strong Penetrating Power(433MHz) : Electronics