GSM Fixed Wireless Terminal/FWT lock card,lock terminal support polar-reverse,12 or 16 KHz pulse signal support GPRS. GSM Fixed Wireless ... Terminal/FWT Unique Functions1,GSM cellular network outgoing.2,GSM cellular network incoming.3, ... meter. (Optional) Technical Specifications1,Work frequency: GSM 900MHZ/1800MHZ or GSM 850/900/1800/1900MHZ2,Power: ≤2 W3, ...