Uploaded December 2025 | Updated September 2026, 3 weeks ago
The Kiisu v4b is a credit-card sized alternative to the Flipper Zero, with many of the same functions. It even runs the same firmware! This is a fun little gadget that can fit right in your wallet (although you'll probably want to 3D-print a case to make it a little more rugged). While it doesn't have every function of the original Flipper, it has a few specialties of its own, like on-board sensors and an expandable radio system.
You can find the Kiisu development page here: kiisu.io
And the US store here: rabbit-labs.com/product/kiisu-development-board-v4b/?v=08a4415e9d59
Documentation here: github.com/kiisu-io/kiisu4
This is the firmware I used: github.com/twoelw/Kiisu-Momentum-Firmware
Saveitforparts t-shirts and other merch at saveitforparts.myspreadshop.com
Join this channel to get access to perks:
youtube.com/channel/UCNLRcEn78Vc62C3GkMvBgtA/join
Or support me via Patreon at patreon.com/saveitforparts
Check out gadgets and devices I like at amazon.com/shop/saveitforparts
The Kiisu v4b is a credit-card sized alternative to the Flipper Zero, with many of the same functions. It even runs the same firmware! This is a fun little gadget that can fit right in your wallet (although you'll probably want to 3D-print a case to make it a little more rugged). While it doesn't have every function of the original Flipper, it has a few specialties of its own, like on-board sensors and an expandable radio system.
You can find the Kiisu development page here: kiisu.io
And the US store here: rabbit-labs.com/product/kiisu-development-board-v4b/?v=08a4415e9d59
Documentation here: github.com/kiisu-io/kiisu4
This is the firmware I used: github.com/twoelw/Kiisu-Momentum-Firmware
Saveitforparts t-shirts and other merch at saveitforparts.myspreadshop.com
Join this channel to get access to perks:
youtube.com/channel/UCNLRcEn78Vc62C3GkMvBgtA/join
Or support me via Patreon at patreon.com/saveitforparts
Check out gadgets and devices I like at amazon.com/shop/saveitforparts
