Security phone for house 1.Support 3G and GSM. 2.Door contact, smoking,infrared and gas sensor and light control,SOS function Security phone for house! Main functons: 1. Support 3G and GSM.2. Safe Guard by SMS.3. Security function, may realize the discrepancy alarm, send alarm message, and other functions .4. Phone book function.5. Adjusting the volume by number in the Hand-free/handset state.6. ...