Attach to car keys house keys bags tents or even your pets for a super long lasting and bright glow that can go on being charged for years to come one day you will be glad you didr r r r this glow in the dark keyring is made from a super tough resin and powerful glow crystals of strontium aluminate which are ten times brighter and glow much much longer than cheaper zinc sulfide glow products the keyring will absorb light in the daytime and release the energy as a bright green glow when