Features: USB step up/ down power supply module, powered by USB, adjust potentiometer to get the required voltage. One button to turn off the output; Supply ON/OFF display screen; Support low power mode,sleep mode; Support both standard USB and Micro USB and pads input voltage; It is not a high power supply, please use it within the power range. Adjust potentiometer to get the required voltage; Package Includes: 1x USB Step Up/ Down Power Supply Module Specifications: Input voltage: DC 3.5-12V; Output voltage:DC 1.2-24V; Input 1.2-2V,output power within 2W; Input 2V-20V,output power within 3W; Input 20V-24V,output power with in 2.5W; Display:3Bit digital tube display; Size:8X2cm/3.15x0.79in Material:Metal note: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. Due to the difference between different monitors, the picture may not reflect the actual color of the item. Our products are made with the highest quality materials and are designed to provide you with the best possible user experience. We strive to ship out all orders within three days of purchase, and the estimated delivery time is 8-61186 days. When shopping, please pay attention to the size and dimensions of the product to ensure that it meets your needs. In the title and , we have provided detailed information about the product, including its features and specifications We want you to be completely satisfied with your purchase, so if you have any questions or concerns, please dont hesitate to contact us. We are here to help and will do our best to assist you. Thank you for choosing our product. We hope you enjoy it