HEL-STAR6 GEN III Electronic Marker 

A marker is an electronic equivalent of popular chemical lights
intended for the attachment to helmets equipped with hook and loop fasteners.
It was made of durable polymer. The
light can operate in two modes: continuous and continuous + white
strobe. It is ideal for identification, position marking and a countless number
of other uses. 

The marker is equipped with a hook and loop fastener, which allows it to be
attached to helmets.

The marker is powered by a single CR123 battery (not included in the set) that
is placed under a flap in the bottom part of the device.