Features:

• Supports Micro SD cards and Micro SDHC card with SD card adapter (high-speed card)
• Level conversion circuit board that interfaces level for 5V or 3.3V
• The power supply is 4.5V ~ 5.5V, and the voltage regulator circuit board is 3.3V.
• Standard communication interface SPI interface
• 4 M2 screw-positioning holes for easy installation
• Control Interface: A total of six pins (GND, VCC, MISO, MOSI, SCK, CS), GND to ground, VCC is the power supply, MISO, MOSI, SCK is SPI bus, and CS is the chip select signal pin
• 3.3V voltage regulator circuit: LDO regulator output is 3.3V level converter chip, Micro SD card supply
• Level conversion circuit: Micro SD card into the direction of the signal is converted to 3.3V; MicroSD card interfaces to control the direction of the MISO signal are also converted into 3.3V
• Positioning holes: 4 M2 screws with a positioning hole diameter of 2.2mm. The positioning of the module is easy to install to achieve an inter-module combination