The Permanent Light Self Luminous 25 Years Key Chain in the Dark !<br><br> Most girls buy back and will hang on the pet's neck, so at night also know where the pet friends, you can derive the many ways to use it !<br><br> Bright and visible unique clear glow completely contained and self-powered. Perfect for decorations.<br><br> Product Sizes: 9x35mm<br> TC4 titanium alloy protection shell<br> Light Range: 7-8cm<br> Brightness: 500<br> Waterproof up to 100 meters<br> Color: Green, Yellow, Blue, Orange, Pink<br><br> <b>Q＆A</b><br> Question: Can it hang on roof lighting ?<br> Answer: No, it is recommended to use light for lighting.<br><br> Question: Titanium alloy TC4 better than ordinary metal ?<br> Answer: Yes, TC4 is one better material inside the titanium alloy materials, solid, unbreak, high strength, good corrosion resistance, high temperature and low temperature resistance and so on, non-ordinary metal comparable.<br><br> Question: Titanium shell will rust ? Is it waterproof ?<br> Answer: Will not rust, it is waterproof, can be used in the outdoor extreme sports. <br><br> <b>NyLeabon</b> always provide all kinds of newest and popular products in our shop with high quality and low price. We are committed to providing every customer best customer service. Any questions, please feel free to contact us, professional service team 24 hours online to help you solve any problem.