... to slove heat emission2 years warrantyconstant, isolated power supplyUL/CE/FCC/TUVMaterial:1/2 aluminum, 1/2 frost ... ABS, PC, 14. No electromagnetism interference, no high power switch and inductance parts, no environment electromagnetism pollution.15 ... . High power complication, no transformer, without additional power consumption.CE&ROHS&PSE so the quality is ...