2G Cellular Gateway w/ 24 hour battery backup This is the perfect solution for remote locations, or where an existing internet connection is not available.Government institutions and other corporations that have specific internet privacy regulations use this gateway.The Cellular Gateway is used to communicate with each wireless sensor. Only one gateway is necessary to operate the system. Just plug the 110 Volt adapter to a outlet and it is all powered up.2-Year minimum plan Cellular Gateway Specifications Cellular Tech Dual Band CDMA Frequency Range: 800 / 1900 MHz Antenna Type SMA Gain (dBi): 1.5 Input Power 5.5 VDC @ 900 mA Cellular Carrier AT&T, Verizon, or Sprint Cellular Gateway Specifications Dimension 5.004 x 3.8 x 1.51 in. Storage Temp -20 to +85 °C (-4 to 185 °F) Enclosure Material (ABS) LED Lights Cellular Status LED, Online Status LED, Sensor Network Status LED Operating Temp -10 to +70 °C (14 to 158 °F) Device Memory 50,000 sensor messages (Sensor messages will be stored in the event of Internet outage) 900 MHz Specifications Operating Freq 900 MHz Operating Frequency Certifications Complies with Part 15 of the FCC Rules. (FCC ID: ZTL-RFSC1)Complies with Industry Canada standards. (IC: 9794A-RFSC1)