Descriptions: This is a mini DC-DC voltage converter module supporting for DC 1-5V input and for DC 5V fixed voltage ouput with high conversion efficiency up to 96 percent . Just 2 AA battery can obtain 5V 0.5A power supply for your electronics devices for ideal for DIY 5V 0.5A power supply. Features: Small DC-DC voltage converter board with working indicator, easy to recognize the working status for DC 1-5V input and 5V fixed voltage output, just provide 2 AA battery can obtain 5V 0.5A power supply High power conversion efficiency up to 96 percent save energy Specifications: Input Voltage: for DC 1V-5V Output Voltage: for Dc 5V Output Current: 500mA Maximum Coversion Efficiency: 96 percent Board Size: 25.22x17.55x5.85mm/0.99x0.69x0.23inch(LxWxH) Quantity: 1 Pc Note: Please allow 1-3mm error due to manual measurement. pls make sure you do not mind before you bid Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thank you! No Retail Package Package Contents: 1 x for DC 1V-5V to 5V Voltage Regulator Module