+rep 10/10 love mew
FERRUM
A mouse or keyboard passthrough at up to 8000 Hz that takes commands from your second computer. KMBox B+ Pro compatible.
Four parts chosen together take 15% off all four. This one can start it.
What this is
FERRUM sits between your mouse or keyboard and your main PC and passes everything through at up to 8000 Hz. It is KMBox B+ Pro compatible, so software made for a B+ Pro works with it as it is.
What it does
- Passes your mouse or keyboard through.
Hold FERRUM with the ports pointing towards you. Your mouse or keyboard plugs into the USB-A port in the middle. The USB-C port on your left goes to your main PC, where FERRUM presents itself as an input device. - Takes commands from your second computer.
The USB-C port on the right goes to the second computer, which opens a serial port and sends commands. You choose in the utility whether FERRUM presents as a mouse, a keyboard, or both. - Reports up to 8000 times a second.
MAKCU is full speed, so it stops at 1000 Hz whatever firmware it runs.
Good to know
- 8000 Hz is the most it can carry.
Your mouse still reports at its own rate. A 1000 Hz mouse gives you 1000 Hz. Your main PC and the game have to keep up as well. - Software isn't included.
We don't sell software. You get it yourself, and it runs on your second computer. Which DMA software to get has what we suggest. - A drop-in for a KMBox B+ Pro.
Your existing software and wiring keep working. - Wireless works too.
A wireless mouse or keyboard works through its own USB receiver. Bluetooth does not go through it. - We recommend MAKCU for most people.
FERRUM's one edge is 8000 Hz, and it is the easy swap if you are replacing a KMBox B+ Pro. For everything else, MAKCU does the same job for $25. MAKCU vs FERRUM says why that matters. - Not plug and play on the second computer.
You install the CP210x serial driver and the Ferrum Utility there before a COM port appears. - Tested before it ships.
Every unit is tested. Free tracked shipping and three months of warranty. - Full setup.
FERRUM setup goes through the wiring, the driver, the utility and your software.
Paying
- Crypto only. Never sent it before? How to pay with crypto shows you how. About ten minutes the first time.
- Crypto payments are final. Unlike a card, a crypto payment cannot be charged back, and crypto sent to the wrong address or network is gone for good. There are no returns on hardware, and the warranty covers faults. Check our terms before you pay.
1x FERRUM device
2 USB-A to USB-C cables
A 3D printed case
Our boxes come with everything you need. Once you have ordered, support is a ticket in our Discord.
We recommend MAKCU. FERRUM is only worth it for an 8000 Hz mouse, or to replace a KMBox B+ Pro. Why we recommend MAKCU goes through it. Still not sure? Ask on the forum, where the answer helps the next person too, or in our Discord.
Specifications
- Type
- Mouse and keyboard passthrough, input relay
- Recommended for
- An 8000 Hz mouse, or replacing a KMBox B+ Pro. For everything else, we recommend MAKCU
- Command set
- KMBox B+ Pro compatible. Not a drop-in for MAKCU, the two speak different command sets
- Polling rate
- Up to 8000 Hz
- Mice
- Supported
- Keyboards
- Supported
- Wireless
- Yes, with its own USB receiver. Not Bluetooth
- Device modes
- Mouse, keyboard, or both
- Left port
- USB-C. To your main PC, on a motherboard port, not the front of the case
- Middle port
- USB-A. Your mouse or keyboard, wired or wireless with its own USB receiver. One device at a time
- Right port
- USB-C. To your second computer
- USB hubs on the input port
- Not supported. It only passes through one device, confirmed by Ferrum
- Serial driver
- CP210x, installed on the second computer
- Utility
- Ferrum Utility, installed on the second computer
- Firmware updates
- TBD
Questions
MAKCU. It does the same job for a lot less, and FERRUM's one edge is 8000 Hz, which only counts with an 8000 Hz mouse. MAKCU vs FERRUM says why we recommend MAKCU.
FERRUM: yes, it goes to 8000 Hz, but that only counts with an 8 kHz mouse, or if you are replacing a KMBox B+ Pro. With a 1000 Hz mouse, 8000 Hz gets you nothing extra. For everything else, we recommend MAKCU.
It should. FERRUM is KMBox B+ Pro compatible, so software written for a B+ Pro talks to it as-is. You still install the CP210x driver and the Ferrum Utility on your second computer first, then point your software at the COM port the utility reports.
FERRUM: yes. Plug a keyboard into the middle port and it passes through to your main PC like normal. Software on your second computer can also press, hold and let go of keys through FERRUM, the same way it moves your mouse, like tapping a reload key for you. Set the device type to Keyboard in the Ferrum Utility.
No. FERRUM only passes through one device, and Ferrum confirmed a USB hub on that port does not work. Pick the mouse or the keyboard.
Yes, if it has its own USB receiver. Plug the receiver in where the mouse would go. Bluetooth doesn't work, because a Bluetooth mouse talks to your PC directly and never goes through the device.
Both go on your second computer.
FERRUM: the CP210x driver, free from Silicon Labs, and the Ferrum Utility, which comes from Ferrum. If their site is down or you can't find it, ask in a ticket in Discord and we send it over.
Put the main PC cable in a port on the back of your motherboard first. Front and top ports can work, but they go through a cable inside the case and can cause dropouts, so use a rear port. Most mice work, wired or wireless with their own USB receiver, but not every one, and Bluetooth does not go through. Check the COM port number and baud rate match what your software expects. Still nothing? Open a ticket in Discord with your motherboard and mouse model. If the unit is faulty, the three months of warranty cover it.
Three months on all of our hardware. Everything is tested before it ships. If a card, fuser or aim device does arrive faulty or develops a hardware fault in that time, show us proof and we replace it. Open a ticket in our Discord. It covers the hardware, not software that will not talk to it, but open a ticket for that too and we will help.
We ship anywhere, free and tracked. Parcels ship in 1–2 days, not counting Sundays, then take 7 to 10 working days, or 3 to 5 with $30 express, for delivery. Customs and import fees are down to your own country, so if they are charged, they are yours to pay. If customs sends a parcel back, we reship it by express at no cost.
The full details are in our shipping, warranty and refund policies.



