The NoxTi Tri keychain, developed by startup Xedge, features a titanium body and utilizes three tritium tubes for illumination. This design eliminates the need for batteries or external charging. The device weighs 15.8 grams and incorporates a silicone gasket and spring system to protect the internal components from impact damage.
Users can select from six colors for the tritium tubes: green, yellow, blue, purple, turquoise, and red. The brightness varies by color, with green being approximately five times brighter than red. Due to the 12.3-year half-life of tritium, the brightness decreases over time, retaining about 25 percent of its initial intensity after 25 years. The tubes are replaceable.
The product is currently available for crowdfunding on Kickstarter. Early backers can purchase the keychain for $35, with the price later rising to $40. The three tritium tubes are sold separately for $60. The manufacturer offers free worldwide shipping for the device.
As an alternative to tritium, the keychain supports photoluminescent tubes that require exposure to light to function. The modular design allows for color combinations, enabling the device to emit different shades from three sides.
