Mini PFM Control Input voltage: 0.9-5V DC Output voltage: 5V DC Any DC voltage input 0.9V ~ 5V, output 5V DC voltage can be stable, with two AA batteries input to the output current of 500 ~ 600MA, single AA battery power supply output current about 200MA Onboard USB female, can supply power directly to the USB interface On-board input voltage indicator High conversion efficiency, maximum to 96% Small dimension PCB size: 34 (mm) x16.2 (mm) Applications: DIY a mobile power supply, only need one battery, you can output 5V voltage for your phone, MP3, MP4, PSP charger, very easy. In order to power your electronic devices when your device needs 5V power supply, when you only have lithium battery, this module can be directly step-up to 5V, solve your problems. Package Includes : *1 X Mini PFM Control DC-DC USB 0.9V-5V to 5V dc Boost Step-up