To use wireless RF sensors for some or all of the zones on the 9000E Security Panel add the 900Mhz Wireless Receiver. This receiver allows the security system to be used with the Innovonics 900Mhz frequency agile transmitters/sensors. This wireless system provides near hardwired system reliability. Supports up to 100 wireless points mapped to any of 32 zones. There are only 32 alarm zones & each point is supervised separately for tamper & low battery, allowing instant identification of problem transmitter point. (Note: the 16-zone expansion module can’t be used when the 900Mhz receiver is being used.)