interface: standard:RS-232/ TTL/ RS-485 8 channels, expandable for 16/32 channels Baud rate: 1200/2400/4800/9600/38400bps * Provide rich interface: standard:RS-232/ TTL/ 485* Carrier frequency: 315MHz, 433 MHz, 450MHz, 670MHz, 868MHz, 915MHz or ISM others; * Supervisory control and data acquisition (SCADA) * Remote control,industry data collection; * Monitoring of remote systems * Production ...