Bell A-198S Plug-and-play of pop fashion, without help professional persons and the installation workers, simple, and flexible of wireless installation design, from is installation Shi of trouble and the spending, and not effects decoration beautiful exemption pull of troubles and the costs spending, special for family housewife installation Bell more with very has attraction of design, except as Bell outside, more can as contact, and paging, and care patients, and emergency notification, uses.