... ,Dangerous 3.Public security--shop mall ect. Security phone for house! Main functons:Main Functions:1, support ... 1800 MHz2, Seed dial and redial function.3, Phone book function.4, Hand free function.5, Adjusting ... ways can be setting into by SMS. Phone . SMS and then phone .9, Displaying date, time, signal strength ... someone get into infra red range within 10 meter. Smoke monitor: It will send signal to ...