Features:brand new and high qualityMade of high quality material, solid, durable and high strength, long service life.It is mainly used to convert unstable voltage into stable voltage output to maintain normal use.Allows you to convert for DC24V voltage to for DC12V voltage.Built-in multiple forprotection includingoverload, overheatand short circuit forprotection, and it can work normally after thecondition is restored.It is an essential product for car audioand video systems.Step-down transformer only, other accessories demo in the picture is not included Specifications:Material: Metal, Electronic ComponentsInput Voltage: for DC20-30VOutput Voltage: for DC12VOptional Output Current: 10/15/20/25/30ASize: approx.11.8 x 11.3cm/4.65 x 4.44inColor: BlackQuantity: 1 Pc Note:1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes:1 x PowerSupply-Step DownTransformer