Great Step-up Module with 0.9-5V input, output 5V for many digital devices, so this is really a great module for designing a portable charger. Useful for your USB charger projects and onboard USB device supply solutions. (ie GoPro cameras).You can supply it with single-cell LiPO or an AA size batter or others. Two AA batteries it can output current of 500 ~ 600MA, a single AA battery power supply can output 200ma current supply, great for mobile phones camera, single-chip, digital products supply.Applications:USB voltage regulator for USB-powered device.This module will bring the USB voltage required for your application at regulated 5V output.Various USB devices need 5V from low voltage batteries.Charge mobile phone/MP4/MP3 from AA battery when traveling .Features:The module adopts a high-performance imported chip, performance is superior to the common module.Work with indicator light.Take the USB female, a wide range of Uses.A single AA battery power supply can output current up to 200~300 ma.Two AA batteries to the output current of 500~600 mA.Work from battery voltage as low as 0.9V, allowing you to maximize battery use.If your USB device is critical on 5V operation you can use this module.Specifications:Input voltage: 0.9-5V DC,Output voltage: 5V DC,Output Current: 500-600mA,Load regulation: 1%Voltage regulation: 0.5%,Input Terminals: Input: IN + input is level, IN-type negative,Switching frequency: 500KHz,Temperature Range: -40 to +85,Dimension: 18 (mm) x 25 (mm),Weight : 5 g.Package Includes:,1 x DC-DC 0.9V-5V to 5V 600MA Step-Up Boost USB Module