1.100/500mW,up to 800m/3km 2.USB 3.433/868/915MHz 4.1200/2400/4800/9600/19200/38400bps ... 5.Various application JZ874 , USB transceiver,1. Ultra low power transmissionTransmission power: 500mW(JZ874B), ... consumptionReceiving current<45mA, transmission current<360mA(JZ874B),. <100mA(JZ874A),3. ISM frequency band, not requiring on application of frequency pointCarrier ...