... Can add up to 100pcs sensors Wireless gsm auto dial home security alarm system LS-GSM-100B Alarm Unit Features:1. Fashionable and high-tech ... system via remote control or telephone when at home or outside.16. Programming for alarm place: help-seeking, fire, gas, door lock ... outgoing, arming at home, arming at appointed time, remote arming via phone.22. Maintain the top priority of alarm: If there is ...