KMBox Net or KMBox B+: which one and why
Two boxes from the same vendor that do the same job over different control links: what the network version adds, when serial is enough, and how to move from one to the other.
Short answer
Both KMBoxes do the same job, but the B+ talks to the second PC over USB serial at 115200 baud. The Net presents a USB Ethernet adapter addressed by IP, port and UUID, which tolerates distance and sustains far more commands per second.
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How the KMBox Net and B+ differ
On the game PC's side these two boxes are the same product. Both present a USB mouse, both pass your physical mouse through, and both run closed vendor firmware that you do not compile. The difference is entirely on the second PC's side, in how the cheat reaches the box. The B and B+ are serial devices that use a COM port at 115200 baud through a CH340 bridge, while the Net is addressed over IP. Everything else said about them, including every performance claim, follows from that one design choice.
KMBox B+ and Net compared
The throughput comparison comes from the vendor's own documentation, and its numbers describe how many commands per second the link can carry, not how well you will aim.
| KMBox B+ / B Pro | KMBox Net | |
|---|---|---|
| Control link | USB serial, CH340 bridge, 115200 baud | Ethernet emulated over USB, 100 Mbit class |
| Second PC sees | A COM port under Ports (COM and LPT) | A USB Ethernet adapter under Network adapters |
| Driver needed | CH340 serial driver | The USB Ethernet adapter driver, usually inbox on Windows |
| Addressed by | COM port number and baud rate | IP address, port and a per-unit UUID |
| Physical RJ45 socket | Not applicable | None. The network is emulated over the USB cable, which surprises everyone once |
| Commands per second | ReportedThe vendor puts the older B board near 300, and warns that pushing past it can hang the box | ReportedThe vendor puts the Net near 1000 and describes the serial-port hang as designed out |
| Distance between machines | Limited by USB cable length | Tolerates a longer run and a switch in the path |
| Setup difficulty | Install CH340, force a low COM number, select port and baud | Set a static IP on the adapter, ping the box, enter IP, port and UUID |
| Cost | Lower | Higher |
| Protocol | Documented serial protocol | ReportedVendor states the protocol is not published and each unit carries its own identifiers |
Both command-rate figures are the vendor's and are quoted as such. We have not measured them, and neither has anyone who repeats them to you on Discord.
How the KMBox Net connects to the second PC
What confuses first-time owners is that no network cable or router is involved. Windows simply gains a network adapter that happens to be reached over USB.
- What appears
- A USB Ethernet adapter in Network and Sharing Centre on the second PC
- Subnet
- The 192.168.2.x range by default
- The box's address
- Its own IP, port and UUID, supplied with the unit and also readable from its configuration
- The second PC's address
- A static IP you set yourself in the same 192.168.2.x range, and not the same address as the box
- How to prove it
- Ping the box's IP from a command prompt on the second PC before you open any cheat
- How the cheat connects
- An initialisation call taking the IP, the port and the UUID. All three must match the unit in front of you
- Ports on the box
- One to the game PC, one labelled for the network side to the second PC, plus the socket your physical mouse goes into
How the KMBox B+ connects to the second PC
The B+ link is simpler in every respect, and when both machines sit on the same desk that simplicity is worth having.
- What appears
- A CH340 serial device under Ports (COM and LPT) on the second PC
- Driver
- The CH340 serial driver, installed on the second PC only
- Baud rate
- 115200. This is the rate the device and the cheat both have to be set to
- COM number
- Force it to a single digit in Device Manager. Several cheats only parse single-digit ports correctly
- How to prove it
- The vendor test utility: run it as administrator, give it the COM number, send a fixed movement and watch the game PC's cursor
- Known limit
- ReportedThe vendor documents that calling it too frequently can hang the box. Do not raise a command-rate setting for the sake of raising it
Which KMBox should you buy?
These five rows cover nearly everybody. If none of them describes you, buy the B+ and spend the difference on a better second PC.
| Situation | Buy | Reasoning |
|---|---|---|
| Both machines on one desk, first build, cost matters | KMBox B+ / B Pro | A COM port and a baud rate is the shortest configuration in this entire hobby. Nothing about the serial link limits ordinary use |
| The second PC is in another room, a cupboard, or behind a switch | KMBox Net | The control link is IP, so distance stops being a cable-length problem |
| You want the highest command rate the vendor offers and do not want to think about it again | KMBox Net | More headroom on the link and, per the vendor, the serial-port hang designed out |
| Your cheat only lists one of the two | Whichever it lists | Software support beats every other consideration on this page. Check the input menu before you order |
| You are still deciding whether you want aim assistance at all | Neither yet | A radar or ESP build needs no input device. Buy one when the decision is made |
How to switch from a B+ to a Net
Nothing physical changes on the game PC's side, so the list is short and the whole migration happens on the second PC.
- Close the cheat and unplug the B+ from both machines
- Wire the Net in the same positions: the game PC to its HID side, the second PC to its network side, and the physical mouse into its mouse socket
- On the second PC, open Network and Sharing Centre, then Change adapter settings, and find the new USB Ethernet adapter
- Open its IPv4 properties, choose a static address, and set an IP in the same 192.168.2.x range as the box, but not the same address
- Set the subnet mask to 255.255.255.0 and leave the gateway empty
- Open a command prompt and ping the box's IP, and do not continue until it replies
- In the cheat, change the device type from the serial KMBox to the network one and enter the IP, port and UUID for your unit
- Run the cheat's movement test and confirm that the cursor moves on the game PC
- You can leave the CH340 driver installed, because it does nothing when no serial KMBox is attached
Warning
What neither KMBox fixes
Both boxes run closed firmware, so the USB identity they present to the game PC is the vendor's decision rather than yours. That is a trade-off: you get a device that works out of the box, but you give up the ability to inspect or change how it looks on the bus. No KMBox model makes you undetectable, and neither one changes how your aim looks in a clip. Upgrading from a B+ to a Net does not address a ban risk either, because it solves a cable-length and command-rate problem. If you are upgrading because something got flagged, the upgrade is not the fix you need.
Common KMBox questions
Does the KMBox Net need a router or a network cable?
No. The box has no RJ45 socket, because Windows creates a virtual USB Ethernet adapter over the USB cable and reaches the box through it. You set a static IP on that adapter and ping the box to confirm the link.
Can I use DHCP instead of a static IP?
No, because nothing on that link hands out addresses. Set a static IP on the second PC's USB Ethernet adapter in the same range as the box.
What is the UUID for?
It identifies your specific unit to the cheat's initialisation call, together with the IP and port. Get it from the unit's own configuration and keep it with your other setup notes.
Is the Net version more secure because the protocol is not public?
ReportedThe vendor makes that claim, and it is fair as far as it goes, because an unpublished protocol is harder to fingerprint than a documented serial one. However, you cannot verify it, and it says nothing about what the game PC sees on its USB bus, which is the same kind of mouse either way.
My cursor moves but overshoots badly on the Net. Is the box faster than the B+?
On the link, yes, so a badly tuned sensitivity or smoothing setting that the serial link's slower command rate used to mask becomes visible. Retune the cheat's movement settings after migrating instead of assuming the box is faulty.
Which one do cheats support better?
Both are widely supported, but this changes between releases. Check the specific software you run, and do it before the purchase rather than after.
Sources
The command-rate figures are quoted as the vendor's own, and nothing in our checked source list covers these boxes.
Read next
- KMBox Net, KMBox B+, MAKCU, Teensy or Arduino: which input device to buy
- KMBox Net setup and configuration
- KMBox B+ setup and configuration
- The cursor will not move: how to fix the input layer
- The full signal chain, from your hand to the game
- MAKCU and MAKCM setup, start to finish
- Setting up a network between the two PCs
Still stuck? Open a ticket on Discord
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