A 12v 500mA current adaptor is a small and efficient power source designed for low-voltage electronics.Long-term stability is important for electronics. If sudden changes in power should occur during operation, the devices cannot be protected against damage. The key features of this power supply include voltage adjustment, over-current protection and short circuit prevention for both the power supply and the connected devices. Then the filter electronics with automatic, reflect that undoubtedly will be popular all over the global.Long-term use without overheating is possible, thanks to technological features such as its compact size and energy efficiency. With this kind of characteristic, it is suitable for applications in which electricity must flow as steadily as possible over long periods.Common uses of this power supply range from lighting for LED lights and small household appliances to charging electronic gadgets and maintaining the battery in other devices.