... function. DIY, Customize, easy-to-use and install! Description:GSM network protection, short message sending function. DIY, Customize, easy- ... to-use and install! It is the updated advanced GSM prepaid module. It features eleven different wireless protection zones, two wired ... 180mm(l)×130mm(w)×32mm(h)10.Standard package : one GSM module ,one remote keyboard, two remote controllers, one PIR, one ...