... US / EU / AU/ UK type plug • Fully enclosed plastic case• Class I/ Class II power • 2 year warranty General Specification Item No.:SMTS ... voltage protection........... Clamp by zener diode > 120%Withstand voltage....................I/P-O/P: 3KVAC, 1minuteWorking temperature ..............-10°C~50° ... 4-2,3,4,5,6,8,11, FCC part15 class B, CNS13438Length of output cable ............ 180cm of UL1185, 18AWG ...