Mouse Double Click Test: All Buttons, M4 and M5

How to test

1
Click every button
Inside the box, to the blinking beat, one click every 350 ms, without spamming. About 20 left clicks is enough.
2
Roll the wheel
Slowly, up and down, about 20 notches each way.
3
Photograph the box
When the bar at the top says every button is tested, take one photo of the whole box. It shows the date and time. Send it to support@micemod.gg or message the Micemod page on Facebook.

How this page decides a double click

This page counts a double click when the same button is pressed again within 80 ms, or was released for under 20 ms before the next press. Both are far faster than normal single clicking. Jitter or butterfly clicking will skew the result, so click slowly, one at a time. The 20 ms figure is our own conservative threshold, not a manufacturer standard; see the questions below.

Line up: button held down. Line down: button released.

Blue window: another press landing here counts as a double click. Its width is written above it.

Normal clickNormalnext press 210 ms later

Pressed again fastDouble50 ms apart

Released too brieflyDoublereleased 12 ms

The page records the time of every press and release to a fraction of a millisecond, then measures the gap shown by the line under each trace. The drawing is to scale. Normal single clicks are always more than 80 ms apart and stay released for more than 20 ms. A bouncing contact does neither.

What causes double clicking

Most mouse buttons use a mechanical switch. Inside, a snap spring flips the moving contact from the upper contact down to the lower one when you press, and back when you let go. Every time it lands, the contact bounces for a few milliseconds before it settles, so the mouse waits for it to settle before counting. That wait is the debounce time.

Most contacts are silver alloy. With use they wear, get dirty or grow a sulfide film, and the bounce gets longer than the debounce window. One press is then counted as two. That is a double click fault.

Debounce

Healthy switch1 click

Worn switch2 clicks

The contact bounces before it settles. A healthy switch settles inside the debounce window. A worn one keeps bouncing past it, and the mouse reads a second click.

Mechanical switchA snap spring flips the contact from the upper to the lower terminal. It bounces on landing.

Optical switchAn infrared beam changes state, so there are no contacts to bounce.

Optical switches have no metal contacts, so they cannot double click from bounce. An SPDT switch whose mouse reads both terminals (NC and NO) also blocks bounce, in the circuit or in firmware.

MechanicalMechanical SPDTOptical

How a press is detectedMetal contacts touchContacts touch, and the mouse reads both the upper and lower contactAn infrared beam changes state, with no contacts at all

Double click from bouncePossible once worn. Relies on debounce.Prevented if the mouse reads both contacts, in the circuit or in firmwareCannot happen

Worth knowingUsed in most miceWear shows up as missed presses or a stuck release rather than double clicks. Many mice wire only 2 of the 3 pins.Usually left and right only. Middle and side buttons stay mechanical.

Fix it yourself first

Blue window: debounce, the time the mouse ignores the contact after a press

Debounce 2 ms2 clicks

Debounce 4 ms1 click

Same worn switch, same signal. With a short window, the contact is still bouncing when the window ends and the mouse reads a new press. A longer window covers the bounce, so it stays one click. The trade-off: the next click can only register once the window has ended. If 4 ms is not enough, the switch is worn.

Debouncems

Go up to 4 ms. If it still double clicks there, stop and treat the switch as worn.

Raise debounce up to 4 ms
Open your mouse software and raise debounce, up to 4 ms. Bench measurements of typical switches average about 1.6 ms of bounce, so 4 ms is comfortable, and the delay is too small to feel in games because most mice still register the press instantly.
Still double clicking at 4 ms means a worn switch
The contact is bouncing far longer than a healthy switch. Do not keep raising it: a higher value only hides the fault, and new firmware cannot repair a worn contact.
Test again, then send us the result
Click slowly, one at a time. If it still double clicks and is under warranty, send us a photo of the result.

Mice built to avoid contact bounce

Optical left and right switches have no contacts to bounce. For the model with an SPDT switch, its maker states it prevents double clicking.

OrbitalPathfinder V2Optical switchView

LamzuMaya XOptical switchView

WLmouseBeast X ProOptical switchView

WLmouseHUAN StainlessOptical switchView

NinjutsoSora V3SPDT switch, pre-orderView

See all of these mice

Is the wheel faulty, or just acting up

Most wheels use a contact encoder with two signals that tell the mouse which way it turned. When the contacts wear or collect dust, the signals chatter and the mouse misreads the direction. You see a jump back: rolling down, one notch registers up, then down again, all within a fraction of a second.

This page only counts notched wheel movement, not touchpads or free-spinning wheels. The result says the encoder is likely the cause. We confirm on the mouse itself.

Rolling downJump back

While you roll one way, a worn encoder slips in one notch the other way. This page counts each one.

What you see	What it means
No jumps back	Normal
1 or 2 in about 50 notches	Likely starting to wear. Test again, and if it is still there, send us the result.
More often	Likely a worn encoder. The encoder needs replacing.

A wheel can also skip notches. No website can detect that alone, so check by eye: roll exactly 10 notches and see if the counter goes up by 10. Some mice use an optical wheel encoder, which has no contacts to wear, and some firmware drops a single isolated reverse notch. That hides the symptom but does not repair the encoder.

Why side buttons do not go back here

Normally the browser uses the side buttons to change page, which makes them impossible to test. This page tells the browser to ignore that while you are here.

Side button

Page stays

Normally a side button makes the browser go back. On this page it is only counted.

Browser	Side buttons
Chrome, Edge, Brave, Opera	Fully tested
Safari 26.4 and newer	Detected
Firefox, older Safari	Not visible to any website. Use Chrome.

Questions

Is my mouse broken if I see one double click?

One can happen if you clicked very fast by accident. Reset and test again slowly. If it comes back, it is the switch.

Why 80 ms and 20 ms?

80 ms is the common default among testers, and normal single clicks are always further apart. 20 ms is our own conservative threshold, not a manufacturer specification. Healthy switches bounce for under 10 ms, Linux treats a release and re-press within about 8 ms as a hardware fault because a person cannot do it, and deliberate single-finger clicking keeps the button up for roughly 50 ms or more. The limit: drag and butterfly clicking can genuinely release for under 20 ms, which is why you should click to the beat. Treat a flag as a reason to check further. We confirm on the mouse itself.

Can an optical switch mouse double click?

Optical left and right buttons cannot double click from contact bounce. Middle and side buttons are usually still mechanical, and debounce or macro settings can also cause it.

Why do I get extra clicks when I lift and set the mouse down?

That is a slam click. Setting the mouse down hard can press a button by impact alone. It is not a worn switch, and some firmware filters it. Keep the mouse on the pad while testing.

Can the wheel click double click too?

Yes. There is a mechanical switch under the wheel, the same kind as left and right click.

Does this page store anything about me?

Nothing you press in the test is sent anywhere. It runs in your browser, and only your light or dark choice and beat sound settings are remembered on your device.

Sources

The technical claims on this page draw on these manufacturer documents and references. The 20 ms threshold and the 350 ms beat are our own settings.

Omron D2F datasheetsnap-action split springs, SPDT, silver alloy contacts, micro-load warning
Omron D2FC-F-7N datasheetthe classic mouse switch: SPST-NO, rated 6 VDC 1 mA, dust and gas warnings
Jack Ganssle, A Guide to Debouncingmeasured bounce: average 1.6 ms, worst 6.2 ms; SR latch on SPDT is the most effective debounce
Fnatic, How to change click debounce4 ms or higher recommended against double clicks
Endgame Gear, SPDT GX modeshardware debounce by reading both contacts
Razer Optical Mouse Switchinfrared beam actuation, no contact bounce
Logitech, Mouse double clicksa mouse that recently began double clicking is a hardware case
ALPS Alpine EC10E encoderwheel encoder chattering and bounce up to 5 ms
Swiftpoint, Reverse scrollingreverse scrolling means the encoder is developing a hardware issue
Ninjutso Sora V3 specifications (reseller listing)SPDT HyperSwitch and the maker's no double click claim (marketing, not a measurement)
XBAB Tech control panel notesSPDT read as a latch in firmware, release-only debounce, slam click filter, isolated reverse scroll filter
qsxcv, avr_wireless_mouse firmware sourcepress registers on the first edge, only the release is debounced
Tom's Hardware, hardware switch debouncingmany mice with SPDT switches wire only two pins
Peter Hutterer, libinput and button debouncinga release and re-press within about 8 ms is not humanly possible and is treated as hardware chatter
libinput, Button debouncingfilters a release immediately followed by a press (spurious mode)
Jack Ganssle, A Guide to Debouncing, part 2most switches bounce under 10 ms; a 20 to 50 ms debounce period is reasonable
Aoki et al., finger tappingmaximum index-finger tapping rate and contact time
MDN, Event.timeStampbrowser timestamp resolution: 0.1 ms in Chrome, coarser in some privacy modes
Chromium, back and forward mouse buttonswhy side buttons can be tested in Chrome

Mouse double click test

How to test

Click every button

Roll the wheel

Photograph the box