Power supply: VCC 4.5~5.5V; Current: 0.2~200mA; Interface electrical level: 3.3V / 5V; Onboard 3.3V voltage regulator circuit; Supports Micro SD up to 2GB; Micro SDHC up to 32GB; Leads: GND, VCC, MISO, MOSI, SCK, CS; SPI standard interface; M2 2.2mm screw installation holes