Intensity Glow Marker

Glow-in-the-dark key ring markers, with a handy key ring attachment Containing photo-luminescent crystals, These markers absorb light and emit a luminous glow in the dark To activate the crystals within the marker, expose the marker to sunlight or any artificial light for 5 minutes and the marker will emit a glow for up to 12 hours One 5 minute charge creates a glow for over 12 hours Has a rechargeable life of up to 10 years