Phone alert system WithU

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WithU is a devide developed for use at home, offices or shops in case of emergency. It can be used by children, elderly people or whoever may find himself in need for help. It's aGSM call system with a single wireless button that can call up to five different telephone numbers, previously set by users. WithU doesn't require a landline, being a GSM system operating with a simple SIM card that can make or receive phone calls through the speakerphone or message (SMS/text). No monthly fees have to be paid. Power - DC12V/1.2A Status current - 10 mA GSM bands - 850/900/1800/1900 MHz Wireless distance - no obstacle 80 m Working temperature - +10 ~ + 45 °C Working humidity - 90% Backup battery - 7,4V/500 mAh