Supports mini SD card (less than 2G), mini SDHC card (less than 32 G) (high-speed card). Level conversion circuit board, the level interface can be 5V or 3.3V. Power 4.5V ~ 5.5V, 3.3V voltage regulator board. Communication interface is a standard SPI interface. Color: As shown Material: PCB, Metal Dimensions: 4.1x2.4cm Control Interface: A six-pin interface (GND, VCC, MISO, MOSI, SCK, CS), GND to ground, VCC is power supply, MISO, MOSI, SCK is SPI bus, CS is chip select signal pin. 3.3V Regulator Circuit: LDO regulator output 3.3V level converter chip, mini SD card power supply. A Level Conversion Circuit: mini SD card towards the signals into 3.3V, miniSD card towards the control interface converted signal also 3.3V, can universal AVR minicontroller system read the signal. Mini SD Card Port: Then bomb the deck for easy insertion and removal of cards. Positioning Holes: 4 M2 screws positioning holes diameter of 2.2mm, the module is easy to install positioning to achieve all-around module combination. Package includes: 1x Micor SD TF Modules Note: Light and different displays may cause the color of the item in the picture to be a little different from the real thing. The measurement allowed error is +/-1-3cm.