Have you lost your original power cable or are you travelling with several devices? Thanks to this adaptable universal power supply, you no longer have to carry all the power cables with you. In fact, the days of looking for a 3, 4.5 or 6 volt adapter for our different devices are over. Just one is enough. Just select the appropriate voltage. In addition, different tips allow you to connect any device you like. Universal transformer, the current of the universal power adapter 3-12V is compatible with 300mA and 500mA 800mA 1000mA, output: 1.2A max. 12W power, compatible with 10W. 6 converter adapters: 2.5x2.5mm, 5.5x2.1mm, 4.0x1.7mm, 3.5x1.35mm, 3.0*1.0mm, 2.5*0.7mm, super suitable for your charging needs, even at home The polarity of the DC connector of this charger is center positive (+) and outside negative (-), usually marked as : - (+ and the polarity of the connectors CANNOT be reversed. Interface during use. It can also extend the service life. 12W replacement comes with 6pcs