... -20KM in the open site 3.TTL/RS232/RS485 wireless adapter 4.remote control RF TransmitterTechnical specification of JZ878 ... Multi- channel The standard JZ878 configuration provides 16 channels to meet the multiple communication combination mode of the user.7. High speed wireless ... of our modules. JZ878 Rf transmitter 433MHZ,options of 450-470MHZ,5/10W,12V,5-20km range wireless broadcasting module