... and ISM band. High Sensitivity: Adopt high performance narrowband RF IC chip. Bandwidth 5KHz, 12.5KHz, 18.75KHz and ... Optional data interface RS-232, RS-485 and TTL. Optional RF Data rate 1200bps, 2400bps, 4800bps,9600bps,19200bps. Safe and ... LED and street lamp control. Power load control devices and instruments remote monitor. Grain depot condition monitor. Oil exploitation AutomationApplication ...