... 1800/1900MHz Network, .>>>>>Specifications of Mainframe: >>Power adapter : DC 12V/1.5A>>Power consumption: 12V input, Max. 50mA/Average ... parameter 9600,n,8,0,1>>Temperature: -20-+70 °C>>Humidity : Relative humidity 95% (condensation free)>>Output drive voltage ... : Equal to input DC voltage>>Output drive power : Drive voltage ≤35V, drive current ...