The MMC HAT (Hardware Attached on Top) adds a second microSD socket to your Raspberry Pi using the second (or third) SDIO interface.

It can be used with Raspberry Pi A+, B+, Zero (with headers), Zero W* (with headers), 2B, 3B*, 3B+* and 4B (* When used on a Raspberry Pi Zero W, 3B or 3B+ the onboard WiFi is disabled as it is on the SDIO interface used by the MMC HAT).

The Raspberry Pi 4 has three SD controllers so you can use onboard SD, WiFi, and the MMC HAT (SD) at the same time on the Pi4!

Applications:

1. Micro SD card reader. Write new images, repair or modify existing Raspberry Pi installations with ease.
2. Additional storage, mount as your home directory or for general storage or backups.
3. RAID1 on the root (/) partition for added reliability.
4. Connector for Controller Serial Console using our USB Serial Adaptor.

Features:

1. High-Quality Construction
2. Expands the Raspberry Pi’s Onboard Micro-SD Card Socket
3. Compatible With  Raspberry Pi A+, Raspberry PI B+, Raspberry Pi Zero & Zero W¹ (with headers), Raspberry 2B, Raspberry Pi 3B¹ & 3B+, Raspberry Pi 4B
4. Easy to Use

Package Includes:

1 x MMC (micro SD) HAT for Raspberry Pi

4 x 12mm M2.5 standoff

8 x 6mm M2.5 screw

4 x stick-on foot