Zip Economizer, Power Supply: 24 VAC ± 20%, 50/60 Hz; Class 2 Power Source, Power Consumption Rating*: 4 VA Base Control (Econ-Zip-Base),5.5 VA Base Control with Energy Module, (Econ-Zip-Base + Econ-Zip-Em),5 VA Base Control with Communication Module(Econ-Zip-Base + Econ-Zip-Com),6.5 VA Base with Energy Module and Communication Module, Rated Impulse Voltage: 330V,Connectors 1/4" Male Spade Connectors,Humidity 5 to 95% RH Non-Condensing, Humidity Input Signal 0-10 VDC; Corresponds to 0 to 100%, Ambient Temperature Range -40°F to +158°F (-40°C to +70°C), Storage Temperature Range -40°F to +176°F (-40°C to +80°C),Display 2"X16" Character LCD; LED Backlight; Transflective Display Op. Range** -22°F To +176°F (-30°C To +80°C), Dims:5-1/2"H X 7-1/8"W X 2"D, Made In Ro