Features: Suitable for electric guitars, automatic dog and anmal feeders, routers and other 10V electronic product. Metal housing waterproof design 3A/4A/5A three kind of current can be selected Input DC12V-24V, black wire negative, input wire length about 13cm. Output DC10V 3A/4A/5A (optional), yellow wire positive, black wire negative, output cable length about 13cm Specifications: Item�� Power Converter Support :DC12-24V to 10V Step Down Converter Output DC10V 3A/4A/5A (optional) Size��About 40x20x25mm/1.57x0.78x0.98in Package Includes: 1PC Power Converter note: Due to the problem of lighting effect and shooting, there might be tolerances in product, please understand. Please allow 0-1cm error due to the measurment