Operating Voltage 9-16VDC Current 25mA Contacts of Tamper NC,12VDC,50mA max Time to Alarm 2.2s Time to Warm 2 minutes RFI characteristic 30V/m at 10Mhz to 1Ghz Operating Temperature -0 to 55 Storage Temperature -20 to 60 Size 128 x 64 x 40 mm