From Paradox Security Systems, the Spectra 1759EX is an advanced 7 to 15-zone security system with a built-in Omnia 433MHz wireless receiver. In addition to the 5 on-board hardwired zones and 2 keypad zones, the 1759EX supports 8 wireless transmitters and 8 remote controls-all without any extra modules. Spectra 1759EX uses encrypted communication with code-hopping technology and options like generating a trouble message or a silent or audible alarm, for the panel and all its modules. For retail chain locations or small commercial installations.