Abstract: A virtual reality system (100) and device for use therein involve an optical detection arrangement (200) configured to detect a light pattern associated with a unique identity, and a tool (300) having a plurality of light-emitting devices (600) engaged therewith. The light-emitting devices (600) are selectively user-actuatable between a plurality of light patterns detectable by the optical detection arrangement (200). The light patterns provide a plurality of unique identities of the tool (300) as detected by the optical detection arrangement (200).