This is a high Quality and Modern Wireless Security System. The Bosch Solution 880 Ultima can support up to 8 Wireless devices. This is an extremely simple system to install and program. The Control Panel comes with a Rechargeable Battery. Additionally it kit comes with phone connection plug.   The Bosch Solution 880 Ultima Kit includes:- - 1 x Bosch Ultima 880 Control Panel, - 1 x Bosch 8 Zone LCD Codepad - 2 x Bosch Wireless 4-Button Keyfob Transmitters, - 2 x Bosch RF940E Wireless PIR's, - 1 x Rechargeable Backup Battery. - 1 x Power Supply. - 1 x Internal Siren. - 1 x External Siren complete with Blue Strobe Light, Siren Cover.