The present invention involves a golf tee coated with colored coatings that when struck with a golf club leave a marking that easily identifies where the ball was struck on the club face and the path of the swing, but does not come off in normal handling. The functional block unit includes an internal resin sealing body having an edge and an opposite edge. When a tag is within operating range of one of the readers, the tag is interrogated for its data and path information comprising timestamps of reader-tag interactions and related event data, and updated path information is stored in the tag cache memory. The tilt sensor supplies a tilt signal to represent the levelness of the laser tilt apparatus.