SODIAL Mini PFM Control DC-DC 0.9V-5V to USB 5V DC Boost Step-up Power Supply Module UK 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