Multiple users on one point-of-sale PC.
Give your cashier and the customer each their own screen, mouse and cursor on a single PC, so the customer can browse, choose or sign while the cashier keeps working the till, neither one stealing the other's pointer. MouseMux is the input layer that turns one Windows PC into a two-sided point-of-sale setup, running right alongside the till software you already use.
One shop? The Ultra licence covers commercial use for a one-time fee, no call needed. A chain? We build the whole system and hand you a ready-to-deploy package.
One PC, two people, one shared order
MouseMux turns one Windows POS PC into a true two-sided counter. Plug in the cashier's mouse and keyboard, a customer-facing touchscreen and any counter devices - a signature pad, a barcode scanner, a keypad - and each one becomes its own independent user with its own cursor, locked to its own screen or window. Neither side can steal the other's pointer, so both sides of the counter work the same sale at the same time.
And the two sides work together, not just next to each other. The cashier can look at the customer's screen through a live mirror view and step in to help, open an on-screen keyboard when the customer needs to type, and the customer can draw their signature right on the touchscreen to confirm the sale.
Below: the customer picks products and scans their loyalty card, the cashier types a search for them and circles the right item on a live view of the customer screen, the customer taps it and signs. One machine, one shared sale, two people working it at once.
MouseMux POS — CashierBehind every kind of counter
The same engine covers a corner shop with two tills and a chain of stores with customer screens, scanners and kiosks. A few of the setups people build with it:
The classic two-sided counter. The cashier rings up the sale while the customer reviews the order, picks options and signs on their own touchscreen - no turning the screen around, no waiting for each other. And the cashier can work on the customer's screen too: watch it live, circle an item, run a search for them or pop up an on-screen keyboard - guided help without leaning over the counter.
Add a customer-facing touch display without the usual headache. On a normal setup every touch yanks the shared cursor away from the cashier - mid-sale, mid-payment. As its own MouseMux user, the touchscreen moves only its own pointer, so a browsing customer can never disturb the till.
Need more throughput? The same trick puts a second cashier on the same PC, each with their own mouse, keyboard and cursor in the same till software. An extra lane at peak hours without buying another machine, till licence or support contract.
Most scanners act like a keyboard and type into whatever field has focus. MouseMux pairs each scanner to the right user, so one scanner covers both product scans and customer loyalty cards, and every scan lands in the correct field - no lost scans, no wrong-field surprises - even with several people working at once.
Lock a user to a single app so the public side can touch only what you allow. The kiosk touchscreen is captured before Windows sees it: no Start menu, no dragged windows, no way out of the kiosk - safe to leave unattended all day. The staff side keeps full control on its own cursor.
An advisor and a customer, each with their own mouse and screen at one desk: the customer signs consent forms, provides ID and fills in details while the advisor guides the process. Signature capture, audit logging and built-in translation give you a compliant paper trail without the paper.
Any counter device becomes its own user
MouseMux works at the Windows input layer, so it does not care how unusual your counter hardware is. It reads any input device, turns it into an independent user, and lets you decide exactly where that user's input is allowed to go.
That is what removes the classic shared-counter problem: a touchscreen or a second pointer stealing the cursor in the middle of a sale. Give it its own user and it can never grab anyone else's pointer again.
Lock a device to one screen or window
Pin the customer touchscreen to the customer display, or a cashier to their own till window, so their input physically cannot land anywhere else.
Route keyboards and scanners
Turn on multi-keyboard to pair each keyboard, or keyboard-style barcode scanner, to a specific user so its keystrokes reach the right window.
Every counter peripheral supported
Barcode scanners, signature pads, numeric keypads, customer displays, touchscreens and pens all run side by side on one machine.
Convert and remap input
Turn a pen into touch, a gamepad into a mouse, or remap buttons and wheels per device to match whatever hardware the counter runs.
Custom systems, built to roll out everywhere
For a single store you can set this up yourself in an afternoon with the Ultra licence. For a chain, we build the whole thing for you: a point-of-sale setup tailored to your hardware and till software, packaged so it deploys the same way in every location.
This is mature technology, not an experiment. MouseMux has specialised in multi-user input on Windows for over a decade, and the same proven engine runs behind counters, control rooms and simulators that cannot afford downtime. It is built to run unattended for months, survive reboots and odd hardware, and fail safe - your till software never depends on it to keep selling.
You get one configuration, tested once and rolled out everywhere, plus the things that actually matter when hundreds of tills depend on it: a support agreement with guaranteed response times, fast remote help, and central control.
Ready-to-go mass deployment
MSI packages with your licences embedded and remote support integrated: one silent install gives every store an identical, tested setup - configuration, licensing and support tooling in a single package, no manual work on site.
SLA and priority support
A support agreement scoped to your rollout, so a problem at the counter has a guaranteed response instead of a queue.
Easy remote support
Support staff connect over RustDesk and get their own cursor on the till, so they fix a lane remotely without taking the terminal away from the cashier.
Central config & volume licensing
One configuration pushed to every location, and licensing priced for the whole estate rather than shop by shop.
Safe, driver-free technology
No kernel drivers, nothing invasive: MouseMux works at the standard Windows input layer. It runs on everything from XP to Windows 11 and has been running on production systems in the field for a decade.
Point-of-sale questions
Can the cashier and the customer both use one PC at once?
Yes, that is the main use. The cashier and the customer each get their own screen, mouse or touchscreen and cursor on one computer, so the customer can browse, choose or sign while the cashier keeps working the till, using the software you already run.
Can I also put a second cashier on the same PC?
Yes. The same setup gives a second cashier their own mouse, keyboard and cursor, so you can add a lane on one machine instead of buying and licensing another.
Is MouseMux point-of-sale software?
No. MouseMux is the input layer underneath: it does not handle inventory or payments. It runs alongside your existing POS or till application and makes it usable by several people, and several devices, at once.
Will a customer touchscreen steal the cashier's cursor?
No, and that is exactly the problem it solves. As its own MouseMux user, a touchscreen moves only its own pointer, so touching it never pulls the cashier's cursor away from their sale.
How do barcode scanners work with it?
Most scanners behave like a keyboard and type the code into the focused field. Enable multi-keyboard and pair the scanner to the cashier who should receive it, and its scans land in the right till field even with several users active.
Which licence do I need for a shop?
Ultra. It covers commercial use, unlimited users and every feature for a one-time fee, and one licence covers two computers. See the pricing page for details.
Can you deploy this across many stores?
Yes. We build a tailored setup and hand you a ready-to-go mass-deployment package, with an SLA, remote support and central configuration. Talk to us about a rollout.
Turn one PC into your whole counter
Run a single shop yourself with the Ultra licence, or let us build and deploy a point-of-sale system across your entire chain.