Find things at night with the Gear Aid Ni Glo Marker Keychain, a glow in the dark keychain and marker for keys and all kinds of outdoor gear including backpacks, tents and SCUBA tanks. This rechargeable key fob is battery and tritium-free. It charges by sunlight or artificial light and glows brightly at first, then fades to a constant glow that can be seen all night. Use it to find gear at the campsite, signal the next big catch, or mark epic trails and dive sites. Whether it's outside or under water, don't fumble around when the sun goes down. It easily attaches to keys, packs, dog collars, guylines, tent zippers, hammock clips, night fishing rods and scuba tanks. It charges within 10 minutes by sunlight, indoor light, flashlight or headlamp. For best results, charge in direct sunlight for 2 hours and watch it glow for up to 10 hours. The glowing light can be seen up to 25 ft. away. Use it to mark a dive site, campsite, hiking trail or the distance from a hunting blind. IPX8 waterproof, dust-proof, and weatherproof, it glows in the rain, dust or snow so you can take it anywhere on land or under water (164 ft deep). It's small and lightweight. Materials: Strontium oxide in plastic with stainless steel keyring.