... Frequency Shift Keying (GFSK) modulation, High anti-interference and Low BER (Bit error Rate); * Half duplex: Integration of ... and transmitter,10ms auto change for receiving and sending; * Low power consumption and sleep function; * Widen Temperature: -35° ... AMR), * Wireless smart terminal: POS, PDA,* Wireless alarm and security systems , PTZ,* Wireless electronic display screen, LED display,* RS- ...