ITEM NAME:DC-DC Boost Converter 3A Regulator Module 12V to 24V Volt Transformer Board Description: Industry grade DC-DC 12V(5V-22V) to 24V(6V-24V) 3A 72W Step-Up Boost Converter Regulator Module. Over Voltage protection, over temperature protection, over current protection, and automatically recover after removing obstacles. It has over 96% power conversion efficiency and it is also dust-proof, Shockproof, suitable for all kinds of harsh environments. Perfect for use in a wide range of applications including vehicles, security systems, equipment, telecommunications etc. Easy installation: there are 4 wires, Red wire is for the input +, Black wire is for the input - ; Yellow wire is for the output +, Black wire is for the output - . Package Includes: 1Piece DC/DC Power Converter..Industry grade DC-DC 12V(5V-22V) to 24V(6V-24V) 3A 72W Step-Up Boost Converter Regulator Module. 1Piece DC/DC Power Converter. Easy installation: there are 4 wires, Red wire is for the input +, Black wire is for the input - ; Yellow wire is for the output +, Black wire is for the output -.