RasPiKey: Plug and Play eMMC Module for Raspberry Pi


RasPiKey is a 16GB/32GB eMMC module for Raspberry Pi.



RasPiKey is a 16GB/32GB eMMC module that can be inserted into Raspberry Pi’s micro SD card slot. It works like a micro SD card with better read/write performance (especially on 4k read/write) and have longer lifetime. RasPiKey has Raspbian (Raspberry Pi OS) preinstalled and allows you configure SSH login and Wi-Fi connection before booting your Raspberry Pi. As a result, you can use your Raspberry Pi without display, keyboard and mouse, and access your Raspberry Pi via SSH session.

RasPiKey is a “plug and play” accessory to most Raspberry Pi models. If you have Raspberry Pi 4B from rather old batch, which has rather old firmware that could not recognize RasPiKey, you may need to update the bootloader of your Raspberry Pi 4B beforehand (please find more details in the user manual).

RasPiKey has two varieties: the 16GB RasPiKey comes with a black lanyard, while the 32GB RasPiKey comes with a blue one.

UPDATED ON 2024.04.25:

The latest version of Raspberry Pi OS (released on March 15th 2024 or later) can support RasPiKey on Raspberry Pi 5, out of box.

This is how we provision RasPiKey now: we flash the official Raspberry Pi OS image (2024-03-15-raspios-bookworm-arm64.img) into RasPiKey, and then put an “ssh” and “userconf.txt” file in its boot partition. This will enable SSH and create the default “pi” user in the system, and allow you to login to your Pi via SSH (if Ethernet cable is connected).

If you want to download the disk image we use for provisioning RasPiKey, you can find it here.

UPDATED ON 2022.06.20:

RasPikey is provisioned with our customised disk image, which equals to official disk image + default “pi” user creation + our headless configuration tools. If you want to download our customised disk image, you can find it here.

If you want to use our headless configuration tools only, you can find it here.



32mm x 19mm x 1.6mm




16GB: Samsung KLMAG1JETD-B041 (datasheet)

32GB: Samsung KLMBG2JETD-B041 (datasheet)

Working Voltage:


Operating Temperature:

-30~80 (-22F~176F)

Storage Temperature:

-40~85 (-40F~185F)


0~80%RH, no condensing


RasPiKey has much better read/write performance than all SD cards on Raspberry Pi 3 and 3B+. Below is the benchmarks (using the same method here) on Raspberry Pi 3B+:

Benchmarks on Raspberry Pi 3B+

Benchmarks on Raspberry Pi 3B+

By upgrading the firmware on Raspberry Pi 4B, DDR52 mode will be supported and RasPiKey can have much better performance now (please find details in the user manual). Below are new benchmarks for RasPiKey on Raspberry Pi 4B (with DDR52 mode supported).

Benchmarks on Raspberry Pi 4B (with DDR52 mode supported)

User Manual

You can find the user manual here: http://www.uugear.com/doc/RasPiKey_UserManual.pdf


Additional information

Weight 0.010 kg
Dimensions 3.2 × 1.9 × 0.16 cm
Choose Capacity

16GB, 32GB


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