... 1800/1900MHz Network, .>>>>>Specifications of Mainframe: >>Power adapter : DC 12V/1.5A>>Power consumption: 12V input, Max. 50mA/Average ... 95% (condensation free)>>Output drive voltage: Equal to input DC voltage>>Output drive power : Drive voltage ≤35V, drive current ... Skype: Samchinese New Upgrading,GSM SMS Controller,RTU5011,Temperature UP DOWN remote control,24V DC Switch,NC NO sensor control