... ,up to 1-3km 2.433/868/915MHz 3.RS232/RS485/TTL 4.1200/2400/4800/9600/ ... Hardware, awaken from COM Port, awaken from Air;3. Modulation mode and Frequency Modulation mode:GFSK,Frequency:433MHZ ... , such as transmission/receiving conversion in the air, control, etc.10. High reliability, small and light Single ... 433/868/915MHz Module | Data Transceiver JZ877 for remote control and industrial,wireless adapter