pulsar thermion

Hi - the Pulsar brochures include the term “recoil activated video” when talking about the unit’s video and still recording capabilities but there is nothing in either the quick start or full instruction manual to describe how you access this functionality. Anyone know how this works?

XM30 RRP £1759.95 Germanium AMOLED 1024 res display, WiFi, Recording https://www.blackwoodoutdoors.co.uk/thermal/thermal-monoculars/pulsar-axion-xm30-thermal-monocular XM38 RRP £2059.95 Germanium AMOLED 1024 res display, WiFi Recording...