Saful GSM-500 home security Alarm System Function Introduction: 1. Apply ... in clock, Operate easily. 5. Sound prompt for all operations. 6. SMS prompt automatically about low power ... Event Log Query: host qutomatically records 40 pieces of all information concerning arm, disarm and alarm events. 23. ... door phone, gsm alarm, Metal detector and other security products. Our goods have passed CE, FCC, Rohs ...