... .Learning Code Product Name:**Wireless Security gsm sms alarm kit****Built-In Backup Battery On Home Alarm Host****Built- ... power both available5 Arm/Disarm ways of gsm sms alarm kit: Remote Controller, Host Keypad , Remote Controlling Keypad(options) , Telephone ... and SMS Internal&external antenna gsm intruder sms alarm kit Optional Technical Parameter:Main unit ParameterGSM frequency 900/1800MHZ ...