Features: Efficient stepping down adapter transforming 4.5V-30V input to 3.3V/5V/9V/12V output, ideal for power devices requiring electricity regulation. Features high efficiency switching technology and overload protective for integration in space constrained installations. Suitable for automotive technicians, industrial engineers, and enthusiasts needing power solution for demanding equipment. Power vehicle accessories, workshop tools, and automation systems where stable 12V supply is critical. Small size, convenient installation and wiring, suitable for the environment with limited space. Specifications: Size:Approx. 19x11mm/0.74x0.43inch Input: 4.5V~30V Output: Default 5V, adjustable to 3.3V 9V 12V Output Current: 1.3A Conversion efficiency: 93% Package Includes: 2 Optional Package: Package 1 Include:2Pcs Stepping Down Adapter Package 2 Include:5Pcs Stepping Down Adapter note: 1.Please allow 1-2cm errors due to manual measurement, making sure that you not mind before order. 2.Due to the differences between different monitors, the picture may not reflect the actual of the item.