The AC DC adapter has certain advantages for both practical and beneficial potential customer s. First of all, it's very versatile, matching many equipment. That way you don 't need to buy a different adapter for each item of equipment. In addition, it can provide a constant power supply unit and protect your electronic systems from power surges and fluctuations. This can therefore greatly extend the service life of those products. Finally, multiple safety protections such as over-voltage or short circuit protection give you peace of mind and are a guarantee that your electric equipment will have no accidents. It is also small and highly portable. That makes it very convenient for travel: no need to have several chargers on your desk ready to go off whenever the power goes two times faster than usual. To sum up, this adapter provides not only stable power but also increased safety and unmatched convenience. Therefore it is an indispensable tool for those of us who own gadgets.