The Extender’s hardware triggering feature allows you to mark external events for post-processing. The input trigger pulses are injected into to the headset data stream within +/-1 sample. There is a fixed 60ms delay between the trigger and the channel signal data which is due to the filter delay for the channels.The trigger pulse is shown in EmotiVPRO as a pink line and is also saved in the hardware column when exporting a file.