Features: DC8V~35V to 1V~15V3A step-down power adapter with adjustable output voltage design. Input DC8V~35V3A, output 1V~15V3A, the input voltage must be 3Volt or more higher than the output voltage. There is a voltage adjustment button at the bottom, and you need to bring your own voltmeter and screwdriver to fill in the voltage. Before use, adjust the voltage first. Input redness positive line and black negative line, with a length of 13cm, output yellow positive line and black negative line, with a length of 13cm. Used to replace AA/LR03/LR6/LR14/LR20 2030 2025 6V 9V and other batteries. Widely used for various toy, LED light, clock, thermometers, instrument, fan and more. Specifications: Material: Aluminum Housing Size: about 50x25x21mm/1.96x0.98x0.82" Input: DC8~35V Output: DC1~15V Package Includes: 1Pc DC8~35V to 1~15V Step-down Power Adapter(Double End Bare Cable) note: Please allow 1-2cm errors due to manual measurement. Please allow for slight color differences due to different display resolution.