... /1900MHz LCD screen GSM Alarm,wireless alarm,home alarm,GSM home alarm,wireless alarm,home alarm system,mms home alarm,home securityDescription and Main functionsFeatures ... Modify 8 wireless zones’ name and check the system status by SMS. 12.Zone classification prevent inside thieves ... ~ 60°CHumidity: 20% to 95% Wireless GSM home alarm system with 24 wireless zones LCD screen and color background light ...