Supports Micro SD Card, Micro SDHC card (high-speed card)
The level conversion circuit board interfaces with 5V or 3.3V levels.
The communication interface is a standard SPI interface.
Control Interface: A total of six pins (GND, VCC, MISO, MOSI, SCK, CS), GND to ground,
VCC is the power supply; MISO, MOSI, SCK are the SPI bus; CS is the chip select signal pin.
3.3V regulator circuit: LDO regulator outputting 3.3V as a level converter chip, supplying the Micro SD card.
Level conversion circuit: Converts signals from the Micro SD card to 3.3V. The MISO signal from the Micro SD card to the control interface is also converted to 3.3V, allowing general AVR microcontroller systems to read the signal.
Micro SD card connector: Yes, the onboard socket allows for easy card insertion and removal.
Positioning holes: Four M2 screw positioning holes with a diameter of 2.2mm, allowing for easy installation and inter-module combination.

Specifications:
Power supply: 4.5V - 5.5V, with a 3.3V voltage regulator circuit board
Positioning holes: Four M2 screw positioning holes with a diameter of 2.2mm
Control Interface: GND, VCC, MISO, MOSI, SCK, CS
Size: 45 x 28mm
Net weight: 6g
Package weight: 16g