ELK-M1XRF319The ELK-M1XRF319 is a Wireless (RF) Receiver and Input Expander for use with the ELK-M1 and ELK-M1EZ8 Controls. The receiver connects to the four (4) wire data (keypad) bus of the control and integrates in much the same way as a M1XIN hardware zone expander except that a single M1XRF can handle up to 144 wireless zones (e.g. transmitter sensors or points). The M1XRFEG receiver is a dual (2) antenna, phase diversity design capable of long range wireless coverage. It is compatible with ELK's 319 Series Wireless Sensors, as well as other 319.5MHz sensors (Interlogix format).