The Paradox SP4000 is a powerful, affordable alarm control panel. Part of Paradox’s exclusive SP series, the SP4000 is flexible, easy to program and extremely expandable. It is compatible with Paradox’s wide range of Spectra SP keypads, modules and devices. It features 4 onboard zone inputs and can be expanded to 32 wired and/or wireless zones. The Spectra SP series allows installers to upgrade their system without any hassle – quickly, easily and in the field. To further simplify installation, all Spectra SP panels can be configured using easy-to-follow, menu-driven programming. The Spectra SP also features versatile communications; this allows your system to communicate via multiple channels, including a built-in landline telephone, IP with the IP150 Internet Module, IP/GPRS/GSM PCS series module and voice with the VDMP3 Plug-In Voice Module. With reliable communication technology, flexible expansion, and user-friendly keypads, the Spectra SP4000 is the foundation for your complete residential or commercial security solution. The SP4000 is fully compatible with the iParadox app, allowing you to remotely control your security system via your iOS or Android smartphone (requires IP150 Internet Module, sold separately). Includes metal housing (not shown).