EXPERT FEATURES 5.5 x 2.1 female to 3.5 x 1.35mm converter plug, plug & play, easy to use. The product is small and lightweight, easy to put in your pocket and easy to carry. The main function of the product is the conversion of the power interface. It has a wide range of applications. It is made of high-quality materials made of plastic and metal, is wear-resistant and durable. Recommended for DC 3 to 24V with a maximum load of 3 amps or less.