GSM Home security alarm with Eight wireless LED defense zone, four wired defense ... the GSM cell phones, no need the fixed telephone line. 4. Can set HOME arm/AWAY arm5. When alarming, system plays ... system to program, it is very easy and quick to be installed and operated 12. With inner back-up ... off, it still can work about 12 hours.13. With output relay, can control the home appliance, like light, ...