100% new and high quality materials of high quality, imported , voltage up to 1200V. 25A current Material: the semiconductor silicon, overvoltage up to 1200 V High voltage capacitor Metal layer resistors ST diode triggering imported potentiometer of multi-tour with heatsink 1.6 mm thick epoxy laminates, the perfect welding thickness of epoxy copper plate:1.6mm How to : Put this series of product with the lamp or electric circuit, (disconnect of fire or the line of the lamp or the electronic device and the two lines of product) rotating the rod, you can adjust the brightness, speed, voltage, and temperature, very convenient to . Package Contents: 1 x Regulator voltage Only the above package content, other products are not included. Note: Light and different displays may the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.