• Measurement of audio visual delay up to ±750 milliseconds
  • Display is rounded to the nearest 1 millisecond or 1/100th of a frame, internal timing resolution of 0.05 milliseconds between light and sound pulse
  • Self calibration adjusts for ambient noise and light, including fluorescent/ LED light flicker
  • Automatic microphone gain adjustment during calibration process


  • Dimensions (H x W x D), 144mm x 90mm x 30mm (5.6" x 3.5" x 1.2”)
  • 165g (5.8oz) excluding batteries
  • 16x2 OLED display for easy viewing, fast response, and low power consumption
  • Operating temperature from 5 to 50 Celsius (41 to 122 Fahrenheit)


  • 2 x AA (LR6) batteries, rechargeable AA batteries are fine too
  • Reverse battery protection
  • Battery life from standard AA batteries is around 50 hours of continuous operation
  • A tiny current of less than 0.1 micro amps is used when off.  Even so when not being used for a while it is always best to remove the batteries  
  • Low battery indication and auto shutdown when batteries become too low to maintain accuracy

Made in the UK

Compliance to standards


EN 55103-1:2009 Part 1 (EMC Emissions)
EN 55103-2:2009 Part 2 (EMC Immunity)
EN 55103-2:2009 (Magnetic Immunity)
IEC 61000-4-2 (ESD)

RoHS compliant and lead free

EAN Product code 712265188507