This is a high Quality and Modern Wireless Security System. The PowerMax Express can support up to 20 Wireless devices. This is an extremely simple system to install and program. This Control Panel has a built in Wireless Receiver, Keypad, Internal Siren and Rechargeable Battery. Additionally it comes with a phone connection cabling and all the screws and mounting accessories required for installation.   The Visonic PowerMax Express Kit includes:- - 1 x Visonic PowerMax Express Panel, - 1 x Visonic Code Secure Wireless 4-Button Transmitter, - 2 x Visonic Discovery Advanced Wireless PIR's, - 1 x Rechargeable Backup Battery   Power Supply sold separately.   PowerMax Express Features: All-in-one, self-contained panel Stylish, ultra-compact design, fits any décor Versatile communications capabilities: Built-in PSTN (Analogue Phone Line) communicator Easy-to-add internal GSM/GPRS and/or Broadband* communications modules for maximum alarm reporting reliability to the central station and back-up for the standard PSTN lines Simple installation and user-friendly operation with intuitive icon based keypad Market leading range of wireless accessories available