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ORDERS PAUSED FOR CHRISTMAS - ORDERS WILL SHIP IN JANUARY. Shipping has slowed and become unreliable, so I'd rather not take the risk.


The Open Source Latency Testing Tool (OSLTT) is the best way to measure latency on everything from monitors, to mice and keyboards. It can measure audio latency for headphone and speaker testing, and can even be triggered via a 2 pin input! It's main features include:

  • Total system / click to photon / end to end latency measurement
  • On Display Latency 
  • In game latency
  • Mouse click / keboard keypress latency
  • Audio latency
  • USB C connectivity
  • 2 pin input for remote triggering
  • Built in status LED

The units are hand built here in the UK and ship worldwide. I aim to build units in batches, with a 1-2 week lead time between ordering and your unit shipping. 


Included in the box:

  • Built, Assembled and Tested OSLTT unit
  • 3 pole (TRS) lavalier microphone
  • Software download card
  • (Optional) 2 pin MOLEX headers/jump leads
  • (Optional) 3 metre braided USB C cable
  • Need more flyleads?

    If you're planning on testing lots of mic and keyboards, you might want another set (or five) of the 2 pin flyleads! I've started selling those directly, so if you need more, add them to your order at no extra shipping cost! 

    Find them here

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