Owner’s Manual

One button.
One light.
Here’s what they mean.

Start with the six cards below — that covers most of it.

Button Light Pairing Wearing Resets Compass Charging Troubleshooting Specs Care

Quick start

Press

Turns it on

Two quick blinks.

Hold 2 s

Turns it off

Three blinks, then dark.

1 flash / 10 s

Working normally

What you should see nearly all the time.

Went dark?

Not broken — press to wake

It turns itself off after 5 minutes without the receiver.

3 taps · left thigh

Full reset

Start of every session. Stand straight first.

2 taps · chest

Point me the right way

When your legs stop lining up with you.

Read this first

Your tracker turns itself off on purpose

  • Lose the receiver for 5 minutes → it powers off completely. No light, no response, even when plugged in.
  • That is battery saving, not a fault. Press the button to turn it back on.
  • Sitting still does not turn it off. On the desk, it stays on until you turn it off.

The button

This is the whole button interface. Nothing on it can wipe your settings by accident.

Press

Turns it on

Two quick blinks. Make it deliberate — a press shorter than a heartbeat sends it back to sleep. No need to hold. While it is running, a single press does nothing.

Hold 2 s

Turns it off

Three quick blinks, then dark. A quick press never turns it off, so bumping it while adjusting a strap is harmless.

2 presses

Recalibrates the compass

Safe by accident: the old calibration keeps working until the new one finishes, and two more presses cancel. See Compass.

3+ presses

Nothing

Deliberately unassigned, so a miscount cannot do anything unexpected.

Hold 5 s
turning on

Clears the pairing

Only while turning it on, and only after a full five seconds — it will not happen by accident. See Pairing.

NotePresses within about half a second of each other count together.

What the light means

These dots blink at the same speed your tracker does. Hold it next to the screen and match it.

Working normally

One brief flash every ten seconds. What you should see nearly all the time. 300 ms on / 9.7 s off

Waiting to pair

A short blip once a second. Looking for a receiver. 100 ms on / 900 ms off

Powering on

Two quick blinks, then it settles. 100 ms × 2

Powering off

Three quick blinks, then dark. 100 ms × 3

Charging

A slow breathing pulse. 5 s cycle

Fully charged

Steady and dim, not blinking. Constant, low

Battery low

A dim, steady blink. Time to charge. 500 ms on / 500 ms off, dim

Compass ready to finish

Fast, insistent blinking during a compass calibration. Set it down and hold it still to finish. 200 ms on / 200 ms off

Something is wrong

A burst of 2, 3 or 4 slow blinks every five seconds. Count them — see Troubleshooting. Repeats every 5 s

Pairing

Your set arrives already paired. You only need this for an unpaired tracker or a new receiver.

  1. Plug the receiver into your PC and leave it in.
  2. Put the receiver into pairing mode from the SlimeVR server.
  3. With the tracker off, hold the button while it turns on — a full five seconds past the two startup blinks.
  4. The light drops to a short blip once a second. It is searching.
  5. Connected = four quick blinks, then the once-every-ten-seconds pattern.

TipPair one at a time. Wait for the four blinks before starting the next — otherwise you cannot tell which one failed.

Wearing and using them

You need

Every session

  1. Plug in the receiver.
  2. Start SteamVR, then the SlimeVR server.
  3. Power on each tracker and wait for the once-every-ten-seconds pattern.
  4. Check every tracker is listed in the server before you put your headset on.
  5. Do a full reset (3 taps, left thigh) — see Resets.

Strap tightTight enough that the tracker cannot twist on your limb. A tracker that swivels reports the strap’s motion, not yours — and no software fixes that.

Resets

2 taps
chest

Point me the right way

Your legs no longer line up after turning around. Face the way you want, tap twice — fixed instantly. The one you will use most.

3 taps
left thigh

Full reset — start of every session

Stand straight, feet together, arms at your sides, looking forward. Tap three times and hold still — it waits about three seconds before reading you.

3 taps
right thigh

Re-learn how the trackers sit on you

Only after moving a tracker or turning it to face another way. Stand straight first — doing it slouched or seated teaches it the wrong thing, and tracking stays poor until you redo it standing.

At the desk instead

Use the buttons in the server window, or these shortcuts — they work anywhere in Windows, even while a game has focus. Tapping is the only way to reset without taking your headset off.

Full resetCtrl+Alt+Shift+Y
Point me the right wayCtrl+Alt+Shift+U
Re-learn the mountingCtrl+Alt+Shift+I

Compass

Recalibrate a drifting tracker

  1. Unplug it and move away from your desk, speakers and anything metal. A USB cable next to the sensor throws the result off.
  2. Press twice. Four blinks = started. Your old calibration keeps working meanwhile.
  3. Turn it through every orientation — each flat side down, then each edge, then each corner. Two blinks = it has seen a new side.
  4. Fast steady blinking = set it down and hold still. Four blinks = saved. Still blinking fast? It wants more angles — keep turning, then set it down again.

Good to know

Charging

Charge withUSB-C
ChargingLight breathes slowly
FullLight steady and dim
A full charge≈ 17–18 h continuous use

Troubleshooting

Most common first.

A tracker went completely dead mid-session

Cause Almost always the 5-minute shutdown — it lost the receiver (out of range, receiver unplugged, software closed).

Fix Press the button. If it keeps happening in one spot, move the receiver somewhere with a clearer line to you — ideally on a short USB extension, not flush against the back of the PC.

One tracker will not connect any more

Check The light. A short blip once a second = unpaired and searching (holding the button 5 s while turning on does that). Re-pair it — see Pairing.

Fix Normal once-every-ten-seconds pattern but missing from the list? Restart the SlimeVR server before touching the tracker.

My computer sees a USB drive instead of a tracker

Cause Firmware update mode. The button cannot put it there — only an update started from a computer does. Nothing is broken or erased.

Fix Did not start an update? Message me and I will walk you through bringing it back.

The light blinks in bursts every five seconds

Cause A fault. Two, three or four blinks each mean something different — count them.

Fix Power it off and on; a startup fault often clears. Same count every time? Tell me the number — it says where to look.

Rapid non-stop blinking that is not the compass signal

Cause Temperature warning.

Fix Out of direct sun, off any heat source, and let it cool before charging.

My body slowly rotates away from where I am facing

Cause Compass drift.

Fix Recalibrate away from metal and magnets — see Compass. Fixable by you in under a minute.

One tracker runs flat much sooner than the others

Note Some variation is normal.

Fix Consistently dying hours before the rest? Tell me — do not open it, and do not leave it charging unattended overnight. See Repairs.

Specifications

SensorICM-45686 — 6-axis motion, plus a 3-axis compass
LinkDedicated 2.4 GHz radio to the supplied receiver
FirmwareSlimeVR (open source)
RequiresWindows PC with SteamVR and the SlimeVR server
Battery life≈ 17–18 h continuous
ChargingUSB-C
Idle shutdownNone — stays on until you turn it off
Link-loss shutdown5 min without the receiver
ControlsOne button
IndicatorsOne LED
NetworkNot Wi-Fi — does not touch your network

Care

Please do not open the case

  • It is designed so I can service it — the parts inside are tiny, and the sensor is not repairable once disturbed.
  • Something failed? See Repairs.
  • Damage from opening or modifying a tracker is not covered by the 30-day return.

Licences & credits

Your trackers run open-source software written by the SlimeVR project and others. Skyline Trackers is not affiliated with SlimeVR — the firmware is theirs, used under its open-source licence.

The full copyright and licence notices for every third-party component in the firmware are published at skylinetrackers.fyi/notices.txt.

The strap latch and eyelet are designed by MoDErahN and used under CC BY-SA 4.0, printed from the designer’s files unmodified.