Both types of mouse jiggler solve the same problem: keeping your status green when you're away from your keyboard. But they work in fundamentally different ways, and those differences matter significantly when it comes to detection risk and IT policy compliance.
How physical mouse jigglers work
A physical jiggler is a USB device — sometimes disguised as a thumb drive — that emulates a mouse at the hardware level. It registers as a HID (Human Interface Device) with your operating system and sends periodic movement signals, usually a small circular or back-and-forth motion.
These cost between $10 and $30 on Amazon and require no software installation. Plug in, switch on, done.
The detection problem
Physical jigglers have one significant weakness: they're detectable through standard IT tooling. Most enterprise endpoint management systems (like Microsoft Intune, Jamf, or CrowdStrike) log all USB devices connected to managed machines. Your IT department can run a query and see:
- Which USB devices have been connected to each machine
- When they were connected and disconnected
- The device class (HID/mouse) and manufacturer ID
More critically: mouse jiggler movement is extremely recognisable in activity logs. It produces a perfectly regular pattern of movement — same interval, same distance, same direction — that no human ever produces. Activity monitoring tools like ActivTrak and Hubstaff flag this pattern automatically.
The movement pattern problem
Even if your IT team doesn't actively monitor USB devices, the movement pattern itself gives you away. Legitimately active users produce irregular, task-driven mouse patterns. A jiggler produces a sine wave. In any system that records mouse coordinates over time, the difference is obvious.
How virtual mouse jigglers work
A virtual jiggler is a browser extension that runs JavaScript in the browser context. Instead of emulating a physical device, it dispatches synthetic DOM events — pointermove, mousemove — that are processed by the browser and passed to any web app running in the same context.
This means Slack (web), Teams (web), and ClickUp all receive what they interpret as legitimate user activity. The browser's idle detection resets. The system-level idle timer resets (because the browser reports activity to the OS). Your status stays green.
Why it's harder to detect
Virtual jigglers generate no USB device log entries. There's no hardware signature. The movement itself is randomised — good implementations use variable intervals and distances — so there's no regular sine-wave pattern to flag.
From a monitoring software perspective, the signals a virtual jiggler produces are indistinguishable from genuine browser activity. There's no separate signal that says "this was generated by a script."
Direct comparison
Physical jiggler:
- Logged in USB device inventory
- Produces recognisable regular movement pattern
- Works at OS level (affects all apps)
- No software to install
- Violates most IT security policies (unauthorised USB devices)
Virtual jiggler (Chrome extension):
- No hardware to log
- Randomised, human-like movement patterns
- Works within browser (affects Slack, Teams, ClickUp, any web app)
- Quick browser extension install
- No policy violation (it's a browser extension, same category as Grammarly or LastPass)
The bottom line
Physical jigglers were a reasonable solution in an era before device management and activity monitoring were standard. In 2026, they're a liability: IT can see them in device logs, and their movement signatures are flagged automatically by activity monitoring software.
A virtual solution generates no hardware trail and produces activity signals that are indistinguishable from genuine use. If keeping your status green is the goal, that's a significant practical difference.