Or consider upgrading to NESS's very latest technology SG111 wireless alarm system using inbuilt GSM (wireless cellular network) to communicate back-to-base, so you won't need an existing cabled phone line. It even operates independently of a permanently wired 240-volt power connection! And being wireless, the SG111 is easily relocated if you move house. For more information click on 'Business Security' to download a brochure, or ask our security adviser to explain the features and benefits...you'll be surprised how little extra it costs to own an SG111.