... auto dia Specification:1.Protection zone:wired : 2wireless:82. GSM band: EGSM900/DCS 1800/PCS 1900MHZ TX RXEGSM 880~ ... , one adaptor, speaker(optional), remote electric control(optional) 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, ...