100% new and high qualitymaterials of high quality, imported , voltage up to 1200V. 25A currentMaterial: the semiconductor silicon, overvoltage up to 1200 VHigh voltage capacitorMetal layer resistorsST diode triggering importedpotentiometer of multi-tour precisionwith heatsink1.6 mm thick epoxy laminates, the perfect weldingthickness of epoxy copper plate:1.6mmHow to use:Put this series of product with the lamp or electric circuit, (disconnect the line of fire or the zero line of the lamp or the electronic device and connect the two lines of product) rotating the rod, you can adjust the brightness, speed, voltage, and temperature, very convenient to use.Package Contents: 2 x Regulator voltageOnly the above package content, other products are not included.Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.