1.small PFM control DC / DC boost controller chip on board.
2. 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 200ma about for mobile phones camera, single-chip, digital products supply. Stable output 5V DC voltage.
3.on board USB female, can be directly powered USB interface device with USB female, versatile.
4.on-board input voltage indicator.
5.PCB size: 34 (mm) x16.2 (mm) ultra-small size, installed in a variety of small equipment.