Interface level: 5V or 3.3V Currency: 0.2-200mA Application: Support Micro SD card(<=2G), micro SDHC card(<=32G) Power Supply: 4.5V to 5.5V , 3.3V voltage Features: 1 support Micro SD card, SDHC Micro card (high speed card) 2 board level conversion circuit, that is, the interface can be 5V or 3.3V 3 power supply for the 4.5V ~ 5.5V, plate load 3.3V voltage regulator circuit 4 communication interface for the standard spi interface 5.4 M2 screw positioning holes, easy to install